Publications 2025

Jamt REG, Gjerde H, Clausen GB, Bache-Andreassen L, Øiestad EL (2025)
Evaluation of DrugWipe® 6S with the WipeAlyser® reader for drug screening of drivers
(in press)
DOI 10.1093/jat/bkaf028, PubMed 40354046

Publications 2024

Gjerde H, Huestis MA, Mulima G, Kajombo C, Sundet M, Pechansky F (2024)
Recommendations for effective collaboration and capacity building in epidemiological studies on the effect of alcohol and drug use on traffic safety in low- and middle-income countries
25 (3), 313-321
DOI 10.1080/15389588.2024.2316720, PubMed 38426896

Gjerde H, Jamt REG, Stenehjem JS, Bogstrand ST (2024)
Substance use and driver fatality in Norway: An expanded case-control study
26 (1), 1-9
DOI 10.1080/15389588.2024.2392274, PubMed 39190537

Publications 2023

Bråthen CC, Jørgenrud BM, Bogstrand ST, Gjerde H, Rosseland LA, Kristiansen T (2023)
Prevalence of use and impairment from drugs and alcohol among trauma patients: A national prospective observational study
54 (12), 111160
DOI 10.1016/j.injury.2023.111160, PubMed 37944451

Gjerde H, Bogstrand ST, Jamt REG, Vindenes V (2023)
Crash-involved THC-positive drivers in Norway have a high frequency of polysubstance use
244, 109800
DOI 10.1016/j.drugalcdep.2023.109800, PubMed 36774807

Gjerde H, Frost J (2023)
Prevalence of alcohol and drugs among drivers killed in road traffic crashes in Norway during 2011-2020
24 (3), 256-261
DOI 10.1080/15389588.2023.2174801, PubMed 36763459

Gjerde H, Oyono Y, Jamt REG, Tayimetha CY, Asongalem EA, Akum EA, Øiestad EL (2023)
Drug analysis: Comparison between dried plasma spots and liquid plasma samples of trauma patients from Cameroon-A feasibility study
16 (3), 303-308
DOI 10.1002/dta.3545, PubMed 37464568

Gjerde H, Strand MC (2023)
Legal limits for driving under the influence of illicit drugs: large variations between jurisdictions
Forensic Sci Int Rep, 8, 100336
DOI 10.1016/j.fsir.2023.100336, PublikaID 443

Strand MC, Gjerde H, Høiseth G (2023)
Nystagmus among suspected amphetamine impaired drivers
95, 102502
DOI 10.1016/j.jflm.2023.102502, PubMed 36924680

Publications 2022

Oyono Y, Gjerde H, Kelley-Baker T, Asongalem EA, Kouomogne Nteungue BA, Tayimetha CY, Djouyep Momo O, Biwole Biwole CP, Mekolo Owandja D, Ngono V, Djakari Y, Ramaekers JG, Achidi Akum E (2022)
Prevalence of alcohol among drivers, riders and pedestrians injured in road traffic crashes in Cameroon: a cross-sectional study
29 (3), 340-347
DOI 10.1080/17457300.2022.2030365, PubMed 35077267

Robertson MB, Li A, Yuan Y, Jiang A, Gjerde H, Staples JA, Brubacher JR (2022)
Correlation between oral fluid and blood THC concentration: A systematic review and discussion of policy implications
173, 106694
DOI 10.1016/j.aap.2022.106694, PubMed 35640367

Publications 2021

Bombana HS, Bogstrand ST, Gjerde H, Jamt REG, Carvalho HB, Andreuccetti G, Bernini CO, Muñoz DR, Leyton V, Greve JMD (2021)
Use of alcohol and illicit drugs by trauma patients in Sao Paulo, Brazil
53 (1), 30-36
DOI 10.1016/j.injury.2021.10.032, PubMed 34749908

Gjerde H, Bretteville-Jensen AL, Bache-Andreassen L, Hanoa K, Furuhaugen H, Brochmann GW, Vindenes V (2021)
Which illicit drugs are injected in Oslo? A study based on analysis of drug residues in used injection equipment and self-reported information
51 (1), 21-27
DOI 10.1177/14034948211043984, PubMed 34538164

Gjerde H, Bretteville-Jensen AL, Furuhaugen H (2021)
Poor correlation between alcohol concentration in oral fluid and breath in subjects consuming beverages immediately before testing
32 (1), 010902
DOI 10.11613/BM.2022.010902, PubMed 34955675

Jørgenrud B, Furuhaugen H, Gjerde H (2021)
Prevalence and Correlates of Illicit Drug Use among Norwegian Nightlife Patrons
56 (11), 1697-1706
DOI 10.1080/10826084.2021.1949613, PubMed 34251973

Oyono Y, Gjerde H, Acha Asongalem E, Kouomogne Nteungue BA, Bamuh E, Deuwa Ngako A, Kelley-Baker T, Ramaekers JG, Lontsi Sonwa L, Enow-Orock G, Achidi Akum E (2021)
Roadside surveys of drinking and driving in Cameroon
22 (5), 349-354
DOI 10.1080/15389588.2021.1922682, PubMed 34014768

Pasnin LT, Gjerde H (2021)
Alcohol and drug use among road users involved in fatal crashes in Norway
22 (4), 267-271
DOI 10.1080/15389588.2021.1887854, PubMed 33724110

Sundet M, Mulima G, Kajombo C, Gjerde H, Christophersen AS, Madsen JE, Young S (2021)
Geographical mapping of road traffic injuries in Lilongwe, Malawi
52 (4), 806-813
DOI 10.1016/j.injury.2021.02.028, PubMed 33712299

Publications 2020

Bakke E, Høiseth G, Furuhaugen H, Berg T, Arnestad M, Gjerde H (2020)
Oral Fluid to Blood Concentration Ratios of Different Psychoactive Drugs in Samples from Suspected Drugged Drivers
42 (5), 795-800
DOI 10.1097/FTD.0000000000000760, PubMed 32251151

Christophersen AS, Karinen R, Mørland J, Gjerde H (2020)
The implementation of per-se limits for driving under the influence of benzodiazepines and related drugs: No increased risk for arrest during therapeutic use in Norway
21 (2), 122-126
DOI 10.1080/15389588.2020.1724977, PubMed 32119573

Gjerde H, Bretteville-Jensen AL, Furuhaugen H, Bache-Andreassen L, Bergh MS, Vindenes V (2020)
Determination of drug residues in used syringe needles
12 (3), 410-416
DOI 10.1002/dta.2759, PubMed 31899604

Jamt REG, Gjerde H, Furuhaugen H, Romeo G, Vindenes V, Ramaekers JG, Bogstrand ST (2020)
Associations between psychoactive substance use and sensation seeking behavior among drivers in Norway
20 (1), 23
DOI 10.1186/s12889-019-8087-0, PubMed 31914964

Sundet M, Kajombo C, Mulima G, Bogstrand ST, Varela C, Young S, Christophersen AS, Gjerde H (2020)
Prevalence of alcohol use among road traffic crash victims presenting to a Malawian Central Hospital: A cross-sectional study
21 (8), 527-532
DOI 10.1080/15389588.2020.1819990, PubMed 33064031

Sundet M, Mulima G, Kajombo C, Gjerde H, Christophersen AS, Young S (2020)
Adult pedestrian and cyclist injuries in Lilongwe, Malawi: a cross-sectional study
32 (4), 197-204
DOI 10.4314/mmj.v32i4.4, PubMed 34457204

Publications 2019

Bakke E, Høiseth G, Arnestad M, Gjerde H (2019)
Detection of Drugs in Simultaneously Collected Samples of Oral Fluid and Blood
43 (3), 228-232
DOI 10.1093/jat/bky079, PubMed 30295809

Bretteville-Jensen AL, Burdzovic Andreas J, Gjersing L, Øiestad EL, Gjerde H (2019)
Identification and Assessment of Drug-User Groups Among Nightlife Attendees: Self-Reports, Breathalyzer-Tests and Oral Fluid Drug Tests
25 (2), 93-102
DOI 10.1159/000497318, PubMed 30783038

Gjerde H, Gjersing L, Baz-Lomba JA, Bijlsma L, Salgueiro-González N, Furuhaugen H, Bretteville-Jensen AL, Hernández F, Castiglioni S, Johanna Amundsen E, Zuccato E (2019)
Drug Use by Music Festival Attendees: A Novel Triangulation Approach Using Self-Reported Data and Test Results of Oral Fluid and Pooled Urine Samples
54 (14), 2317-2327
DOI 10.1080/10826084.2019.1646285, PubMed 31398072

Gjerde H, Gjersing L, Furuhaugen H, Bretteville-Jensen AL (2019)
Correspondence between Oral Fluid Drug Test Results and Self-Reported Illicit Drug Use among Music Festival Attendees
54 (8), 1337-1344
DOI 10.1080/10826084.2019.1580295, PubMed 30860932

Gjerde H, Ramaekers JG, Mørland JG (2019)
Methodologies for establishing the relationship between alcohol/drug use and driving impairment - Differences between epidemiological, experimental, and real-case studies
31 (2), 141-160
PubMed 31270059

Gjersing L, Bretteville-Jensen AL, Furuhaugen H, Gjerde H (2019)
Illegal substance use among 1,309 music festival attendees: An investigation using oral fluid sample drug tests, breathalysers and questionnaires
47 (4), 400-407
DOI 10.1177/1403494818821481, PubMed 30632949

Jamt REG, Gjerde H, Romeo G, Bogstrand ST (2019)
Association between alcohol and drug use and arrest for driving under the influence after crash involvement in a rural area of Norway: a case-control study
9 (1), e023563
DOI 10.1136/bmjopen-2018-023563, PubMed 30610022

Leyton V, Bombana HS, Magalhães JG, Panizza HN, Sinagawa DM, Takitane J, Carvalho HB, Andreuccetti G, Yonamine M, Gjerde H, Muñoz DR (2019)
Trends in the use of psychoactive substances by truck drivers in São Paulo State, Brazil: A time-series cross sectional roadside survey (2009-2016)
20 (2), 122-127
DOI 10.1080/15389588.2018.1552786, PubMed 30933546

Nyman AAT, Jamt REG, Nilsson G, Gjerde H, Bogstrand ST (2019)
Rusmidler og trafikkfarlige legemidler blant bilførere i Finnmark fylke og Murmansk-regionen.
Oslo universitetssykehus, Oslo
PublikaID 409

Ponce JC, Andreuccetti G, Gonçalves REM, Gjerde H, Bogstrand ST, Valen A, Leyton V, de Carvalho HB (2019)
Comparison of traffic data and blood alcohol concentration among fatally injured drivers in Norway and Sao Paulo, Brazil, 2005-2015
20 (7), 673-678
DOI 10.1080/15389588.2019.1648797, PubMed 31408371

Strand MC, Ramaekers JG, Gjerde H, Mørland J, Vindenes V (2019)
Pharmacokinetics of Single Doses of Methadone and Buprenorphine in Blood and Oral Fluid in Healthy Volunteers and Correlation With Effects on Psychomotor and Cognitive Functions
39 (5), 489-493
DOI 10.1097/JCP.0000000000001077, PubMed 31305338

Valen A, Bogstrand ST, Vindenes V, Frost J, Larsson M, Holtan A, Gjerde H (2019)
Fatally injured drivers in Norway 2005-2015-Trends in substance use and crash characteristics
20 (5), 460-466
DOI 10.1080/15389588.2019.1616700, PubMed 31169405

Valen A, Bogstrand ST, Vindenes V, Frost J, Larsson M, Holtan A, Gjerde H (2019)
Driver-related risk factors of fatal road traffic crashes associated with alcohol or drug impairment
131, 191-199
DOI 10.1016/j.aap.2019.06.014, PubMed 31306833

Publications 2018

Furuhaugen H, Jamt REG, Nilsson G, Vindenes V, Gjerde H (2018)
Roadside survey of alcohol and drug use among Norwegian drivers in 2016-2017: A follow-up of the 2008-2009 survey
19 (6), 555-562
DOI 10.1080/15389588.2018.1478087, PubMed 29927625

Gjerde H, Clausen GB, Andreassen E, Furuhaugen H (2018)
Evaluation of Dräger DrugTest 5000 in a Naturalistic Setting
42 (4), 248-254
DOI 10.1093/jat/bky003, PubMed 29409046

Gjerde H, Romeo G, Mørland J (2018)
Challenges and common weaknesses in case-control studies on drug use and road traffic injury based on drug testing of biological samples
28 (11), 812-820
DOI 10.1016/j.annepidem.2018.08.006, PubMed 30217677

Jørgenrud B, Bogstrand ST, Furuhaugen H, Jamt REG, Vindenes V, Gjerde H (2018)
Association between speeding and use of alcohol and medicinal and illegal drugs and involvement in road traffic crashes among motor vehicle drivers
19 (8), 779-785
DOI 10.1080/15389588.2018.1518577, PubMed 30681887

Strand MC, Vindenes V, Gjerde H, Mørland JG, Ramaekers JG (2018)
A clinical trial on the acute effects of methadone and buprenorphine on actual driving and cognitive function of healthy volunteers
85 (2), 442-453
DOI 10.1111/bcp.13818, PubMed 30515857

Takitane J, Leyton V, Andreuccetti G, Gjerde H, Vindenes V, Berg T (2018)
Determination of cocaine, metabolites and a crack cocaine biomarker in whole blood by liquid-liquid extraction and UHPLC-MS/MS
289, 165-174
DOI 10.1016/j.forsciint.2018.05.030, PubMed 29885489

Publications 2017

Bombana HS, Gjerde H, Dos Santos MF, Jamt REG, Yonamine M, Rohlfs WJC, Muñoz DR, Leyton V (2017)
Prevalence of drugs in oral fluid from truck drivers in Brazilian highways
273, 140-143
DOI 10.1016/j.forsciint.2017.02.023, PubMed 28273545

Breen JM, Naess PA, Gjerde H, Gaarder C, Stray-Pedersen A (2017)
The significance of preexisting medical conditions, alcohol/drug use and suicidal behavior for drivers in fatal motor vehicle crashes: a retrospective autopsy study
14 (1), 4-17
DOI 10.1007/s12024-017-9934-x, PubMed 29185214

Jamt REG, Gjerde H, Normann PT, Bogstrand ST (2017)
Roadside survey on alcohol and drug use among drivers in the Arctic county of Finnmark (Norway)
18 (7), 681-687
DOI 10.1080/15389588.2017.1283027, PubMed 28112544

Valen A, Bogstrand ST, Vindenes V, Gjerde H (2017)
Increasing use of cannabis among arrested drivers in Norway
18 (8), 801-806
DOI 10.1080/15389588.2017.1321114, PubMed 28448164

Valen A, Bogstrand ST, Vindenes V, Gjerde H (2017)
Toxicological findings in suspected drug-impaired drivers in Norway - Trends during 1990-2015
280, 15-24
DOI 10.1016/j.forsciint.2017.09.010, PubMed 28942374

Publications 2016

Christophersen AS, Mørland J, Stewart K, Gjerde H (2016)
International trends in alcohol and drug use among vehicle drivers
28 (1), 37-66
PubMed 26841722

Edvardsen HME, Moan IS, Christophersen AS, Gjerde H (2016)
Bruk av rusmidler, sløvende legemidler og tobakk blant arbeidstakere i utvalgte bransjer i Norge
Rapport, x, x
PublikaID 269

Gjerde H, Mørland J (2016)
Risk for involvement in road traffic crash during acute cannabis intoxication
111 (8), 1492-5
DOI 10.1111/add.13435, PubMed 27324309

Strand MC, Gjerde H, Mørland J (2016)
Driving under the influence of non-alcohol drugs--An update. Part II: Experimental studies
28 (2), 79-101
PubMed 27257716

Vindenes V, Strand DH, Koksæter P, Gjerde H (2016)
Detection of Nitrobenzodiazepines and Their 7-Amino Metabolites in Oral Fluid
40 (4), 310-2
DOI 10.1093/jat/bkw020, PubMed 27013620

Publications 2015

Bogstrand ST, Larsson M, Holtan A, Staff T, Vindenes V, Gjerde H (2015)
Associations between driving under the influence of alcohol or drugs, speeding and seatbelt use among fatally injured car drivers in Norway
78, 14-19
DOI 10.1016/j.aap.2014.12.025, PubMed 25725424

Christophersen AS, Gjerde H (2015)
Prevalence of alcohol and drugs among motorcycle riders killed in road crashes in Norway during 2001-2010
80, 236-42
DOI 10.1016/j.aap.2015.04.017, PubMed 25932788

Edvardsen HM, Moan IS, Christophersen AS, Gjerde H (2015)
Use of alcohol and drugs by employees in selected business areas in Norway: a study using oral fluid testing and questionnaires
10, 46
DOI 10.1186/s12995-015-0087-0, PubMed 26681976

Gjerde H, Langel K, Favretto D, Verstraete AG (2015)
Detection of illicit drugs in oral fluid from drivers as biomarker for drugs in blood
256, 42-5
DOI 10.1016/j.forsciint.2015.06.027, PubMed 26295911

Gjerde H, Nordfjærn T, Bretteville-Jensen AL, Edland-Gryt M, Furuhaugen H, Karinen R, Øiestad EL (2015)
Comparison of drugs used by nightclub patrons and criminal offenders in Oslo, Norway
265, 1-5
DOI 10.1016/j.forsciint.2015.12.029, PubMed 26826845

Gjerde H, Strand MC, Mørland J (2015)
Driving Under the Influence of Non-Alcohol Drugs--An Update Part I: Epidemiological Studies
27 (2), 89-113
PubMed 26227253

Høiseth G, Middelkoop G, Mørland J, Gjerde H (2015)
Has Previous Abuse of Flunitrazepam Been Replaced by Clonazepam?
21 (4), 217-21
DOI 10.1159/000377628, PubMed 25895512

Publications 2014

Bogstrand ST, Gjerde H (2014)
Which drugs are associated with highest risk for being arrested for driving under the influence? A case-control study
240, 21-8
DOI 10.1016/j.forsciint.2014.03.027, PubMed 24814328

Christophersen AS, Gjerde H (2014)
Prevalence of alcohol and drugs among car and van drivers killed in road accidents in Norway: an overview from 2001 to 2010
15 (6), 523-31
DOI 10.1080/15389588.2013.848981, PubMed 24867563

Edvardsen HM, Karinen R, Moan IS, Oiestad EL, Christophersen AS, Gjerde H (2014)
Use of alcohol and drugs among health professionals in Norway: a study using data from questionnaires and samples of oral fluid
9 (1), 8
DOI 10.1186/1745-6673-9-8, PubMed 24612541

Gjerde H, Bogstrand ST, Lillsunde P (2014)
Commentary: why is the odds ratio for involvement in serious road traffic accident among drunk drivers in Norway and Finland higher than in other countries?
15 (1), 1-5
DOI 10.1080/15389588.2013.780651, PubMed 24279959

Gjerde H, Langel K, Favretto D, Verstraete AG (2014)
Detection of 4 benzodiazepines in oral fluid as biomarker for presence in blood
36 (2), 252-6
DOI 10.1097/FTD.0b013e3182a3ab42, PubMed 24061449

Gjerde H, Langel K, Favretto D, Verstraete AG (2014)
Estimation of equivalent cutoff thresholds in blood and oral fluid for drug prevalence studies
38 (2), 92-8
DOI 10.1093/jat/bkt122, PubMed 24451086

Gjerde H, Sousa TR, De Boni R, Christophersen AS, Limberger RP, Zancanaro I, Oiestad EL, Normann PT, Mørland J, Pechansky F (2014)
A comparison of alcohol and drug use by random motor vehicle drivers in Brazil and Norway
25 (3), 393-400
DOI 10.1016/j.drugpo.2014.01.019, PubMed 24613265

Sinagawa DM, De Carvalho HB, Andreuccetti G, Do Prado NV, De Oliveira KC, Yonamine M, Muñoz DR, Gjerde H, Leyton V (2014)
Association between travel length and drug use among Brazilian truck drivers
16 (1), 5-9
DOI 10.1080/15389588.2014.906589, PubMed 24697351

Vindenes V, Boix F, Koksæter P, Strand MC, Bachs L, Mørland J, Gjerde H (2014)
Drugged driving arrests in Norway before and after the implementation of per se law
245, 171-7
DOI 10.1016/j.forsciint.2014.10.038, PubMed 25447190

Publications 2013

Gjerde H, Christophersen AS, Normann PT, Assum T, Oiestad EL, Mørland J (2013)
Norwegian roadside survey of alcohol and drug use by drivers (2008-2009)
14 (5), 443-52
DOI 10.1080/15389588.2012.728016, PubMed 23697895

Gjerde H, Christophersen AS, Normann PT, Morland J (2013)
Associations between substance use among car and van drivers in Norway and fatal injury in road traffic accidents: A case-control study
Transp. Res. Pt. F-Traffic Psychol. Behav., 17, 134-144
DOI 10.1016/j.trf.2012.11.004

Gjerde H, Christophersen AS, Normann PT, Mørland J (2013)
Increased population drinking is not always associated with increased number of drink driving convictions
108 (12), 2221-3
DOI 10.1111/add.12342, PubMed 24148108

Langel K, Gjerde H, Favretto D, Lillsunde P, Øiestad EL, Ferrara SD, Verstraete AG (2013)
Comparison of drug concentrations between whole blood and oral fluid
6 (5), 461-71
DOI 10.1002/dta.1532, PubMed 24039237

Legrand SA, Gjerde H, Isalberti C, Van der Linden T, Lillsunde P, Dias MJ, Gustafsson S, Ceder G, Verstraete AG (2013)
Prevalence of alcohol, illicit drugs and psychoactive medicines in killed drivers in four European countries
21 (1), 17-28
DOI 10.1080/17457300.2012.748809, PubMed 23297822

Lund HM, Gjerde H, de Courtade SM, Oiestad EL, Christophersen AS (2013)
A Norwegian study of the suitability of hair samples in epidemiological research of alcohol, nicotine and drug use
37 (6), 362-8
DOI 10.1093/jat/bkt038, PubMed 23689070

Lund HME, Gjerde H, DeCourtade SM, Øiestad EL, Christophersen AS (2013)
A Norwegian study of the suitability of hair samples in epidemiological research of alcohol, nicotine and drug use
J Anal Toxicol, 37 (6), 362-8
DOI 10.1093/jat/bkt038 , PublikaID 266

Publications 2012

Bogstrand ST, Gjerde H, Normann PT, Rossow I, Ekeberg Ø (2012)
Alcohol, psychoactive substances and non-fatal road traffic accidents--a case-control study
12, 734
DOI 10.1186/1471-2458-12-734, PubMed 22943663

Das A, Gjerde H, Gopalan SS, Normann PT (2012)
Alcohol, drugs, and road traffic crashes in India: a systematic review
13 (6), 544-53
DOI 10.1080/15389588.2012.663518, PubMed 23137084

Gjerde H, Christophersen AS, Normann PT, Pettersen BS, Sabaredzovic A, Samuelsen SO, Mørland J (2012)
Analysis of alcohol and drugs in oral fluid from truck drivers in Norway
13 (1), 43-8
DOI 10.1080/15389588.2011.627957, PubMed 22239142

Reid MJ, Langford KH, Grung M, Gjerde H, Amundsen EJ, Morland J, Thomas KV (2012)
Estimation of cocaine consumption in the community: a critical comparison of the results from three complimentary techniques
2 (6)
DOI 10.1136/bmjopen-2012-001637, PubMed 23144259

Vindenes V, Lund HM, Andresen W, Gjerde H, Ikdahl SE, Christophersen AS, Øiestad EL (2012)
Detection of drugs of abuse in simultaneously collected oral fluid, urine and blood from Norwegian drug drivers
219 (1-3), 165-71
DOI 10.1016/j.forsciint.2012.01.001, PubMed 22284072

Vindenes V, Lund HME, Andresen W, Gjerde H, Ikdahl SE, Christophersen AS, Øiestad EL (2012)
Detection of drugs of abuse in simultaneously collected oral fluid, urine and blood from Norwegian drug drivers
Forensic Sci Int, 219 (1-3), 165
PublikaID 265

Publications 2011

Gjerde H, Christophersen AS, Normann PT, Mørland J (2011)
Toxicological investigations of drivers killed in road traffic accidents in Norway during 2006-2008
212 (1-3), 102-9
DOI 10.1016/j.forsciint.2011.05.021, PubMed 21665393

Gjerde H, Normann PT, Christophersen AS, Mørland J (2011)
Prevalence of driving with blood drug concentrations above proposed new legal limits in Norway: estimations based on drug concentrations in oral fluid
210 (1-3), 221-7
DOI 10.1016/j.forsciint.2011.03.021, PubMed 21482055

Gjerde H, Normann PT, Christophersen AS, Samuelsen SO, Mørland J (2011)
Alcohol, psychoactive drugs and fatal road traffic accidents in Norway: a case-control study
43 (3), 1197-203
DOI 10.1016/j.aap.2010.12.034, PubMed 21376919

Gjerde H, Verstraete AG (2011)
Estimating equivalent cutoff thresholds for drugs in blood and oral fluid using prevalence regression: a study of tetrahydrocannabinol and amphetamine
212 (1-3), e26-30
DOI 10.1016/j.forsciint.2011.06.024, PubMed 21775080

Gjerde H, Øiestad EL, Christophersen AS (2011)
Using biological samples in epidemiological research on drugs of abuse
Norsk Epidemiologi, 21 (1), 5-14
PublikaID 293

Lund HM, Øiestad EL, Gjerde H, Christophersen AS (2011)
Drugs of abuse in oral fluid collected by two different sample kits--stability testing and validation using ultra performance tandem mass spectrometry analysis
879 (30), 3367-77
DOI 10.1016/j.jchromb.2011.09.002, PubMed 21962269

Lund HME, Øiestad EL, Gjerde H, Christophersen AS (2011)
Drugs of abuse in oral fluid collected by two different sample kits-stability testing and validation using ultra performance tandem mass spectrometry analysis.
J Chromatogr B Analyt Technol Biomed Life Sci, 879 (30), 3367-77
DOI 10.1016/j.jchromb.2011.09.002 , PublikaID 263

Publications 2010

Gjerde H, Christophersen AS, Moan IS, Yttredal B, Walsh JM, Normann PT, Mørland J (2010)
Use of alcohol and drugs by Norwegian employees: a pilot study using questionnaires and analysis of oral fluid
5, 13
DOI 10.1186/1745-6673-5-13, PubMed 20550667

Gjerde H, Mordal J, Christophersen AS, Bramness JG, Mørland J (2010)
Comparison of drug concentrations in blood and oral fluid collected with the Intercept sampling device
34 (4), 204-9
DOI 10.1093/jat/34.4.204, PubMed 20465866

Gjerde H, Normann PT, Christophersen AS (2010)
The prevalence of alcohol and drugs in sampled oral fluid is related to sample volume
34 (7), 416-9
DOI 10.1093/jat/34.7.416, PubMed 20822680

Gjerde H, Øiestad EL, Øiestad ÅM, Langødegård M, Gustavsen I, Hjelmeland K, Bernard JP, Christophersen AS (2010)
Comparison of zopiclone concentrations in oral fluid sampled with Intercept(®) oral specimen collection device and Statsure Saliva Sampler™ and concentrations in blood
34 (9), 590-3
DOI 10.1093/jat/34.9.590, PubMed 21073813

Høiseth G, Yttredal B, Karinen R, Gjerde H, Christophersen A (2010)
Levels of ethyl glucuronide and ethyl sulfate in oral fluid, blood, and urine after use of mouthwash and ingestion of nonalcoholic wine
34 (2), 84-8
DOI 10.1093/jat/34.2.84, PubMed 20223100

Høiseth G, Yttredal B, Karinen R, Gjerde H, Mørland J, Christophersen A (2010)
Ethyl glucuronide concentrations in oral fluid, blood, and urine after volunteers drank 0.5 and 1.0 g/kg doses of ethanol
34 (6), 319-24
DOI 10.1093/jat/34.6.319, PubMed 20663284

Publications 2009

Gjerde H, Verstraete A (2009)
Can the prevalence of high blood drug concentrations in a population be estimated by analysing oral fluid? A study of tetrahydrocannabinol and amphetamine
195 (1-3), 153-9
DOI 10.1016/j.forsciint.2009.12.011, PubMed 20045272

Publications 2008

Gjerde H, Normann PT, Pettersen BS, Assum T, Aldrin M, Johansen U, Kristoffersen L, Øiestad EL, Christophersen AS, Mørland J (2008)
Prevalence of alcohol and drugs among Norwegian motor vehicle drivers: a roadside survey
40 (5), 1765-72
DOI 10.1016/j.aap.2008.06.015, PubMed 18760106

Publications 2001

Gjerde H, Snøtun A, Hem H, Larsen KH, Døhl J (2001)
Determination of mangafodipir trisodium and related impurities in bulk substance and pharmaceutical formulation by ion-pair high-performance liquid chromatography
25 (1), 109-14
DOI 10.1016/s0731-7085(00)00500-8, PubMed 11274864

Publications 1993

Gjerde H, Beylich KM, Mørland J (1993)
Incidence of alcohol and drugs in fatally injured car drivers in Norway
25 (4), 479-83
DOI 10.1016/0001-4575(93)90078-b, PubMed 8357462

Gjerde H, Hasvold I, Pettersen G, Christophersen AS (1993)
Determination of amphetamine and methamphetamine in blood by derivatization with perfluorooctanoyl chloride and gas chromatography/mass spectrometry
17 (2), 65-8
DOI 10.1093/jat/17.2.65, PubMed 8492568

Publications 1992

Gjerde H, Dahlin E, Christophersen AS (1992)
Simultaneous determination of common benzodiazepines in blood using capillary gas chromatography
10 (5), 317-22
DOI 10.1016/0731-7085(92)80046-p, PubMed 1354986

Ruud J, Gjerde H (1992)
[Alcohol consumption among convicted drivers]
112 (25), 3216-20
PubMed 1462298

Publications 1991

Gjerde H (1991)
Screening for cannabinoids in blood using EMIT: concentrations of delta-9-tetrahydrocannabinol in relation to EMIT results
50 (1), 121-4
DOI 10.1016/0379-0738(91)90140-e, PubMed 1657743

Gjerde H, Fongen U, Gundersen H, Christophersen AS (1991)
Evaluation of a method for simultaneous quantification of codeine, ethylmorphine and morphine in blood
51 (1), 105-10
DOI 10.1016/0379-0738(91)90210-a, PubMed 1752586

Gjerde H, Kinn G (1991)
Impairment in drivers due to cannabis in combination with other drugs
50 (1), 57-60
DOI 10.1016/0379-0738(91)90133-4, PubMed 1657744

Gjerde H, Mørland J (1991)
A case of high opiate tolerance: implications for drug analyses and interpretations
104 (4), 239-40
DOI 10.1007/BF01369814, PubMed 1931742

Publications 1990

Christophersen AS, Gjerde H, Bjørneboe A, Sakshaug J, Mørland J (1990)
Screening for drug use among Norwegian drivers suspected of driving under influence of alcohol or drugs
45 (1-2), 5-14
DOI 10.1016/0379-0738(90)90216-l, PubMed 2159431

Gjerde H, Christophersen AS, Bjørneboe A, Sakshaug J, Mørland J (1990)
Driving under the influence of other drugs than alcohol in Norway
40, 71-7
PubMed 2135865

Gjerde H, Christophersen AS, Skuterud B, Klemetsen K, Mørland J (1990)
Screening for drugs in forensic blood samples using EMIT urine assays
44 (2-3), 179-85
DOI 10.1016/0379-0738(90)90248-w, PubMed 2180797

Gjerde H, Smith-Kielland A, Normann PT, Morland J (1990)
Driving under the influence of toluene
44 (1), 77-83
DOI 10.1016/0379-0738(90)90170-4, PubMed 2303210

Publications 1989

Sollid LM, Markussen G, Ek J, Gjerde H, Vartdal F, Thorsby E (1989)
Evidence for a primary association of celiac disease to a particular HLA-DQ alpha/beta heterodimer
169 (1), 345-50
DOI 10.1084/jem.169.1.345, PubMed 2909659

Publications 1988

Gjerde H, Bjørneboe A, Bjørneboe GE, Bugge A, Drevon CA, Mørland J (1988)
A three-year prospective study of rearrests for driving under influence of alcohol or drugs
20 (1), 53-7
DOI 10.1016/0001-4575(88)90014-0, PubMed 3337765

GJERDE H, JOHNSEN J, BJORNEBOE A, BJORNEBOE GEA, MORLAND J (1988)
A COMPARISON OF SERUM CARBOHYDRATE-DEFICIENT TRANSFERRIN WITH OTHER BIOLOGICAL MARKERS OF EXCESSIVE DRINKING
Scand. J. Clin. Lab. Invest., 48 (1), 1-6

Gjerde H, Johnsen J, Bjørneboe A, Bjørneboe GE, Mørland J (1988)
A comparison of serum carbohydrate-deficient transferrin with other biological markers of excessive drinking
48 (1), 1-6
DOI 10.3109/00365518809085386, PubMed 3217743

Gjerde H, Mørland J (1988)
A two year prospective study of rearrests for drunken driving
16 (2), 111-3
DOI 10.1177/140349488801600209, PubMed 2898808

Publications 1987

Bjørneboe A, Bjørneboe GE, Gjerde H, Bugge A, Drevon CA, Mørland J (1987)
A retrospective study of drugged driving in Norway
33 (4), 243-51
DOI 10.1016/0379-0738(87)90105-8, PubMed 3034750

Gjerde H (1987)
Daily drinking and drunken driving
15 (2), 73-7
DOI 10.1177/140349488701500204, PubMed 2885913

GJERDE H, AMUNDSEN A, SKOG OJ, MORLAND J, AASLAND OG (1987)
SERUM GAMMA-GLUTAMYL-TRANSFERASE - AN EPIDEMIOLOGIC INDICATOR OF ALCOHOL-CONSUMPTION
BRIT J ADDICT, 82 (9), 1027-1031

Gjerde H, Amundsen A, Skog OJ, Mørland J, Aasland OG (1987)
Serum gamma-glutamyltransferase: an epidemiological indicator of alcohol consumption?
82 (9), 1027-31
DOI 10.1111/j.1360-0443.1987.tb01564.x, PubMed 2890368

GJERDE H, MORLAND J (1987)
CONCENTRATIONS OF CARBOHYDRATE-DEFICIENT TRANSFERRIN IN DIALYZED PLASMA FROM DRUNKEN DRIVERS
Alcohol Alcohol., 22 (3), 271-276

Gjerde H, Mørland J (1987)
Concentrations of carbohydrate-deficient transferrin in dialysed plasma from drunken drivers
22 (3), 271-6
PubMed 2887174

Gjerde H, Mørland J (1987)
The prevalence of binge drinking and heavy drinking among drunken drivers arrested due to involvement in road traffic accidents
24 (3), 199-203
PubMed 3501962

GJERDE H, NORMANN PT, MORLAND J (1987)
DETERMINATION OF SERUM TRYPTOPHAN BY ISOCRATIC HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY AND ULTRAVIOLET DETECTION
BIOMED BIOCHIM ACTA, 46 (1), 53-57

Gjerde H, Normann PT, Mørland J (1987)
Determination of serum tryptophan by isocratic high-performance liquid chromatography and ultraviolet detection
46 (1), 53-7
PubMed 3579886

Publications 1986

Gjerde H, Engelstad KS, Mørland J (1986)
A comparison of female and male drivers arrested on suspicion of driving under the influence of alcohol or drugs
23 (6), 438-43
PubMed 2879548

Gjerde H, Sakshaug J, Mørland J (1986)
Heavy drinking among Norwegian male drunken drivers: a study of gamma-glutamyltransferase
10 (2), 209-12
DOI 10.1111/j.1530-0277.1986.tb05073.x, PubMed 2872834

Publications 1985

GJERDE H, GADEHOLT G, OLSEN H, MORLAND J, NORMAN N (1985)
11-DEOXYCORTISOL INDUCES HEPATIC TRYPTOPHAN OXYGENASE IN RATS
ACTA PHARMACOL TOX, 57 (1), 36-39

Gjerde H, Gadeholt G, Olsen H, Mørland J, Norman N (1985)
11-Deoxycortisol induces hepatic tryptophan oxygenase in rats
57 (1), 36-9
DOI 10.1111/j.1600-0773.1985.tb00006.x, PubMed 4050454

Gjerde H, Mørland J (1985)
Determination of gamma glutamyltransferase in completely haemolysed blood samples
45 (7), 661-4
DOI 10.3109/00365518509155275, PubMed 2866579

Gjerde H, Mørland J, Olsen H (1985)
The antiglucocorticoid RU486 inhibits the ethanol-induced increase of tryptophan oxygenase
23 (6A), 1091-2
DOI 10.1016/0022-4731(85)90074-3, PubMed 4094416

Mørland J, Stowell L, Gjerde H (1985)
Ethanol increases rat liver tryptophan oxygenase: evidence for corticosterone mediation
2 (2), 255-9
DOI 10.1016/0741-8329(85)90055-2, PubMed 4015847

Publications 1984

Gjerde H, Helgeland L (1984)
Effect of warfarin on ATP content, viability, glycosylation and protein synthesis in isolated rat hepatocytes
54 (5), 385-8
DOI 10.1111/j.1600-0773.1984.tb01946.x, PubMed 6464783

GJERDE H, HELGELAND L (1984)
EFFECT OF WARFARIN ON ATP CONTENT, VIABILITY, GLYCOSYLATION AND PROTEIN-SYNTHESIS IN ISOLATED RAT HEPATOCYTES
ACTA PHARMACOL TOX, 54 (5), 385-388