Per Henrik Zahl

Summary

Affiliation: Norwegian Institute of Public Health
Country: Norway

Publications

  1. ncbi request reprint Regression analysis with multiplicative and time-varying additive regression coefficients with examples from breast and colon cancer
    Per Henrik Zahl
    Section of Medical Statistics, University of Oslo, Norway
    Stat Med 22:1113-27. 2003
  2. ncbi request reprint [Does organized mammographic screening reduce the breast cancer mortality?]
    Per Henrik Zahl
    Tidsskr Nor Laegeforen 122:551; author reply 551. 2002
  3. ncbi request reprint Results of the Two-County trial of mammography screening are not compatible with contemporaneous official Swedish breast cancer statistics
    Per Henrik Zahl
    Norwegian Institute of Public Health, P O Box 4404, Nydalen, 0403, Oslo, Norway
    Dan Med Bull 53:438-40. 2006
  4. pmc An inverse association between tumour size and overdiagnosis may explain the results by Bucchi et al
    P H Zahl
    Br J Cancer 92:1814; author reply 1815-6. 2005
  5. pmc Overdiagnosis of breast cancer in Denmark
    P H Zahl
    Br J Cancer 90:1686; author reply 1687. 2004
  6. doi request reprint Overdiagnosis of breast cancer after 14 years of mammography screening
    Per Henrik Zahl
    Division of Mental Health, Norwegian Institute of Public Health, Norway
    Tidsskr Nor Laegeforen 132:414-7. 2012
  7. pmc Overdiagnosis in organised mammography screening in Denmark. A comparative study
    Karsten J Jørgensen
    The Nordic Cochrane Centre, Rigshospitalet, Dept 3343, Blegdamsvej 9, DK 2100 Copenhagen, Denmark
    BMC Womens Health 9:36. 2009
  8. pmc Education, sense of mastery and mental health: results from a nation wide health monitoring study in Norway
    Odd Steffen Dalgard
    Norwegian Institute of Public Health, Division of Mental Health, Nydalen, Oslo, Norway
    BMC Psychiatry 7:20. 2007
  9. pmc An investigation of the apparent breast cancer epidemic in France: screening and incidence trends in birth cohorts
    Bernard Junod
    FORMINDEP, Roubaix, France
    BMC Cancer 11:401. 2011
  10. ncbi request reprint [Overdiagnosis in mammography screening]
    Per Henrik Zahl
    Divisjon for epidemiologi, Nasjonalt folkehelseinstitutt, Postboks 4404, 0403 Nydalen
    Tidsskr Nor Laegeforen 124:2238-9. 2004

Detail Information

Publications36

  1. ncbi request reprint Regression analysis with multiplicative and time-varying additive regression coefficients with examples from breast and colon cancer
    Per Henrik Zahl
    Section of Medical Statistics, University of Oslo, Norway
    Stat Med 22:1113-27. 2003
    ..The method is applied on 3201 female breast cancer and 1372 male colon cancer patients...
  2. ncbi request reprint [Does organized mammographic screening reduce the breast cancer mortality?]
    Per Henrik Zahl
    Tidsskr Nor Laegeforen 122:551; author reply 551. 2002
  3. ncbi request reprint Results of the Two-County trial of mammography screening are not compatible with contemporaneous official Swedish breast cancer statistics
    Per Henrik Zahl
    Norwegian Institute of Public Health, P O Box 4404, Nydalen, 0403, Oslo, Norway
    Dan Med Bull 53:438-40. 2006
    ..In this trial, official Swedish health registries were used to identify breast cancers and breast cancer deaths in the study population...
  4. pmc An inverse association between tumour size and overdiagnosis may explain the results by Bucchi et al
    P H Zahl
    Br J Cancer 92:1814; author reply 1815-6. 2005
  5. pmc Overdiagnosis of breast cancer in Denmark
    P H Zahl
    Br J Cancer 90:1686; author reply 1687. 2004
  6. doi request reprint Overdiagnosis of breast cancer after 14 years of mammography screening
    Per Henrik Zahl
    Division of Mental Health, Norwegian Institute of Public Health, Norway
    Tidsskr Nor Laegeforen 132:414-7. 2012
    ..We have now been screening women for 14 years, and during a period when the use of hormones has fallen by 70 %...
  7. pmc Overdiagnosis in organised mammography screening in Denmark. A comparative study
    Karsten J Jørgensen
    The Nordic Cochrane Centre, Rigshospitalet, Dept 3343, Blegdamsvej 9, DK 2100 Copenhagen, Denmark
    BMC Womens Health 9:36. 2009
    ..We quantified overdiagnosis in the Danish mammography screening programme, which is uniquely suited for this purpose, as only 20% of the Danish population has been offered organised mammography screening over a long time-period...
  8. pmc Education, sense of mastery and mental health: results from a nation wide health monitoring study in Norway
    Odd Steffen Dalgard
    Norwegian Institute of Public Health, Division of Mental Health, Nydalen, Oslo, Norway
    BMC Psychiatry 7:20. 2007
    ....
  9. pmc An investigation of the apparent breast cancer epidemic in France: screening and incidence trends in birth cohorts
    Bernard Junod
    FORMINDEP, Roubaix, France
    BMC Cancer 11:401. 2011
    ..Overdiagnosis was defined as non progressive tumours diagnosed as cancer at histology or progressive cancer that would remain asymptomatic until time of death for another cause...
  10. ncbi request reprint [Overdiagnosis in mammography screening]
    Per Henrik Zahl
    Divisjon for epidemiologi, Nasjonalt folkehelseinstitutt, Postboks 4404, 0403 Nydalen
    Tidsskr Nor Laegeforen 124:2238-9. 2004
    ..This suggests that mammography screening results in a substantial degree of overdiagnosis...
  11. ncbi request reprint [Scientific criteria methods for estimating and evaluation of screening]
    Per Henrik Zahl
    Avdeling for helsestatistikk Nasjonalt folkehelseinstitutt Postboks 4404, 0403 Nydalen
    Tidsskr Nor Laegeforen 123:333-6. 2003
  12. pmc The relationship between sales of SSRI, TCA and suicide rates in the Nordic countries
    Per Henrik Zahl
    Department of Suicide Research and Prevention, Division of Mental Health, Norwegian Institute of Public Health, Oslo, Norway
    BMC Psychiatry 10:62. 2010
    ..We studied whether the rapid increase in sales of SSRIs and the corresponding decline in TCAs in the period 1990-98 were associated with a decline in suicide rates...
  13. pmc Incidence of breast cancer in Norway and Sweden during introduction of nationwide screening: prospective cohort study
    Per Henrik Zahl
    Norwegian Institute of Public Health, PO Box 4404 Nydalen, N 0403 Oslo, Norway
    BMJ 328:921-4. 2004
    ..To determine whether any increase in the incidence of breast cancer in women detected by mammography is compensated for by a drop in the incidence after age 69, years when women are no longer invited for screening...
  14. doi request reprint Natural history of breast cancers detected in the Swedish mammography screening programme: a cohort study
    Per Henrik Zahl
    Norwegian Institute of Public Health, Nydalen, Oslo, Norway i no
    Lancet Oncol 12:1118-24. 2011
    ..We did a similar analysis of data collected during an earlier period when few women were exposed to hormone replacement therapy...
  15. pmc Chain of care for patients who have attempted suicide: a follow-up study from Bærum, Norway
    Håkon A Johannessen
    Department of Suicide Research and Prevention, Division of Mental Health, Norwegian Institute of Public Health, Oslo, Norway
    BMC Public Health 11:81. 2011
    ..This study aimed to test the effectiveness of the team's interventions in preventing repeated suicide attempts and suicide deaths, as part of a chain of care model for all general hospital treated suicide attempters...
  16. doi request reprint Hormone therapy use and breast cancer incidence by histological subtypes in Sweden and Norway
    Pål Suhrke
    Department of Pathology, Oslo University Hospital, Oslo, Norway
    Breast J 18:549-56. 2012
    ..Declining rates of ILC, but not of IDC, support the hypothesis that the drop in breast cancer incidence is associated with reduced HT use...
  17. pmc Changes in mental health services and suicide mortality in Norway: an ecological study
    Håkon A Johannessen
    Division of Mental Health, Department of Suicide Research and Prevention, Norwegian Institute of Public Health, Oslo, Norway
    BMC Health Serv Res 11:68. 2011
    ..Since 1990, and particularly after 1998, there has been a substantial increase in mental health service resources in Norway. This study aimed to investigate whether these changes have had an impact on suicide mortality...
  18. doi request reprint Changes in institutional psychiatric care and suicidal behaviour: a follow-up study of inpatient suicide attempters in Baerum, Norway
    Håkon A Johannessen
    Division of Mental Health, Department of Suicide Research and Prevention, Norwegian Institute of Public Health, 0403, Oslo, Norway
    Soc Psychiatry Psychiatr Epidemiol 44:845-51. 2009
    ..During the past decades, extensive reformatory changes in institutional psychiatric care have been implemented in Norway...
  19. ncbi request reprint Is birth history the key to highly educated women's higher breast cancer mortality? A follow-up study of 500,000 women aged 35-54
    Bjørn Heine Strand
    Division of Epidemiology, Norwegian Institute of Public Health, Oslo, Norway
    Int J Cancer 117:1002-6. 2005
    ..57, 95% CI = 1.15-2.13), indicating that there were differences in other confounders than birth history among the childless...
  20. ncbi request reprint Social inequalities in mortality: changes in the relative importance of income, education and household size over a 27-year period
    Marit A Rognerud
    Norwegian Institute of Public Health, Division of Epidemiology, Oslo, Norway
    Eur J Public Health 16:62-8. 2006
    ..The aim of this paper was to measure socio-economic inequalities in mortality over a 27-year period, and estimate the simultaneous effects of education and income adjusted for changing proportions and potential confounders...
  21. ncbi request reprint [No effect of organized cervix cancer screening]
    Per Henrik Zahl
    Tidsskr Nor Laegeforen 128:1302; author reply 1302. 2008
  22. doi request reprint Biases in estimates of overdetection due to mammography screening
    Per Henrik Zahl
    Lancet Oncol 9:199-201; author reply 201-2. 2008
  23. ncbi request reprint A decline in breast-cancer incidence
    Per Henrik Zahl
    N Engl J Med 357:510-1; author reply 513. 2007
  24. ncbi request reprint Spontaneous regression of cancerous tumors detected by mammography screening
    Per Henrik Zahl
    JAMA 292:2579-80; author reply 2580. 2004
  25. ncbi request reprint Do model results suggest spontaneous regression of breast cancer?
    Per Henrik Zahl
    Int J Cancer 118:2647; author reply 2649. 2006
  26. pmc Ramifications of screening for breast cancer: definition of overdiagnosis is confusing in follow-up of Malmö trial
    Per Henrik Zahl
    BMJ 332:727-8. 2006
  27. ncbi request reprint What is publication?
    Peter C Gøtzsche
    Nordic Cochrane Centre, HS Rigshospitalet, DK 2100 København Ø, Denmark
    Lancet 368:1854-6. 2006
  28. ncbi request reprint Constant relative survival rates in Sweden and Norway when adjusting for screening-related overdiagnosis
    Per Henrik Zahl
    Int J Cancer 120:2279; author reply 2280. 2007
  29. ncbi request reprint [Is overdiagnosing with 50 percent in mammography screening acceptable?]
    Per Henrik Zahl
    Tidsskr Nor Laegeforen 127:207-8; author reply 208. 2007
  30. ncbi request reprint [Estrogen replacement therapy and breast cancer]
    Per Henrik Zahl
    Tidsskr Nor Laegeforen 125:1045; author reply 1045. 2005
  31. ncbi request reprint [Social inequality and trends in mortality among singles in Norway]
    Per Henrik Zahl
    Nasjonalt folkkehelseinstitutt, Division for epidemiologi, Oslo
    Tidsskr Nor Laegeforen 123:1822-5. 2003
    ..Mortality rates are known to be high among singles, a group that has increased over time. Monitoring the health status of singles and identifying high-risk subgroups are valuable efforts for evaluation and planning purposes...
  32. pmc Reduction in mortality from breast cancer: decrease with screening was marked in younger age group
    Per Henrik Zahl
    BMJ 330:1024; author reply 1025. 2005
  33. pmc Model of outcomes of screening mammography: spontaneous regression of breast cancer may not be uncommon
    Per Henrik Zahl
    BMJ 331:350; author reply 351. 2005
  34. ncbi request reprint Bias when calculating breast cancer mortality after screening mammography in British Colombia
    Per Henrik Zahl
    Int J Cancer 120:2521; author reply 2522. 2007
  35. ncbi request reprint Undeclared motives in withdrawing a publication
    Peter C Gøtzsche
    Lancet 369:1690. 2007