| Statistical models based on counting processes PK Andersen, O Borgan, RD Gill, N Keiding Springer Science & Business Media, 2012 | 5573 | 2012 |
| Evidence for decreasing quality of semen during past 50 years. E Carlsen, A Giwercman, N Keiding, NE Skakkebæk British medical journal 305 (6854), 609-613, 1992 | 4133 | 1992 |
| Male reproductive health and environmental xenoestrogens. J Toppari, JC Larsen, P Christiansen, A Giwercman, P Grandjean, ... Environmental health perspectives 104 (suppl 4), 741-803, 1996 | 2003 | 1996 |
| WHO Expert Committee on Drug Dependence [meeting held in Geneva from 8 to 13 October 1973]: twentieth report WHO Expert Committee on Drug Dependence, World Health Organization World Health Organization, 1974 | 740* | 1974 |
| Thrombotic stroke and myocardial infarction with hormonal contraception Ø Lidegaard, E Løkkegaard, A Jensen, CW Skovlund, N Keiding N Engl J Med 366, 2257-2266, 2012 | 711 | 2012 |
| Multi-state models for event history analysis PK Andersen, N Keiding Statistical methods in medical research 11 (2), 91-115, 2002 | 704 | 2002 |
| Regional differences in semen quality in Europe N Jørgensen, AG Andersen, F Eustache, DS Irvine, J Suominen, ... Human reproduction 16 (5), 1012-1019, 2001 | 601 | 2001 |
| Age‐specific incidence and prevalence: a statistical perspective N Keiding Journal of the Royal Statistical Society: Series A (Statistics in Society …, 1991 | 498 | 1991 |
| High frequency of sub-optimal semen quality in an unselected population of young men AG Andersen, TK Jensen, E Carlsen, N Jørgensen, AM Andersson, ... Human Reproduction 15 (2), 366-372, 2000 | 438 | 2000 |
| Neurobehavioral deficits associated with PCB in 7-year-old children prenatally exposed to seafood neurotoxicants P Grandjean, P Weihe, VW Burse, LL Needham, E Storr-Hansen, ... Neurotoxicology and teratology 23 (4), 305-317, 2001 | 420 | 2001 |
| Evidence for increasing incidence of abnormalities of the human testis: a review. A Giwercman, E Carlsen, N Keiding, NE Skakkebæk Environmental health perspectives 101 (suppl 2), 65-71, 1993 | 388 | 1993 |
| Time to pregnancy and semen parameters: a cross-sectional study among fertile couples from four European cities R Slama, F Eustache, B Ducot, TK Jensen, N Jørgensen, A Horte, S Irvine, ... Human Reproduction 17 (2), 503-515, 2002 | 377 | 2002 |
| Methylmercury exposure biomarkers as indicators of neurotoxicity in children aged 7 years P Grandjean, E Budtz-Jørgensen, RF White, PJ Jørgensen, P Weihe, ... American journal of epidemiology 150 (3), 301-305, 1999 | 373 | 1999 |
| Depression as a prognostic factor for breast cancer mortality K Hjerl, EW Andersen, N Keiding, HT Mouridsen, PB Mortensen, ... Psychosomatics 44 (1), 24-30, 2003 | 335 | 2003 |
| Association of in utero exposure to maternal smoking with reduced semen quality and testis size in adulthood: a cross-sectional study of 1,770 young men from the general … TK Jensen, N Jørgensen, M Punab, TB Haugen, J Suominen, B Zilaitiene, ... American journal of epidemiology 159 (1), 49-58, 2004 | 322 | 2004 |
| The role of frailty models and accelerated failure time models in describing heterogeneity due to omitted covariates N Keiding, PK Andersen, JP Klein Statistics in medicine 16 (2), 215-224, 1997 | 310 | 1997 |
| Unemployment and mortality in Denmark, 1970-80. L Iversen, O Andersen, PK Andersen, K Christoffersen, N Keiding Br med J (Clin res ed) 295 (6603), 879-884, 1987 | 281 | 1987 |
| Association between mercury concentrations in blood and hair in methylmercury-exposed subjects at different ages E Budtz-Jørgensen, P Grandjean, PJ Jørgensen, P Weihe, N Keiding Environmental research 95 (3), 385-393, 2004 | 277* | 2004 |
| The association between early menopause and risk of ischaemic heart disease: influence of hormone therapy E Løkkegaard, Z Jovanovic, BL Heitmann, N Keiding, B Ottesen, ... Maturitas 53 (2), 226-233, 2006 | 273 | 2006 |
| Statistical methods for the analysis and presentation of the results of bone marrow transplants. Part I: unadjusted analysis JP Klein, JD Rizzo, MJ Zhang, N Keiding Bone marrow transplantation 28 (10), 909-915, 2001 | 270 | 2001 |
