Survival bias in observational studies of the impact of routine immunizations on childhood survival

Tropical Medicine and International Health

Volumn 12, Issue 1, 2007, Pages 5-14

  Jensen, Henrik ^a,d   Benn, Christine Stabell ^a   Lisse, Ida Maria ^a,b   Rodrigues, Amabelia ^a   Andersen, Per Kragh ^c   Aaby, Peter ^a  

^a DEPARTMENT OF EPIDEMIOLOGY RESEARCH   (Denmark)

^b GENTOFTE UNIVERSITY HOSPITAL   (Denmark)

^c UNIVERSITY OF COPENHAGEN   (Denmark)

^d STATENS SERUM INSTITUT   (Denmark)

Author keywords

Childhood survival; Diphtheria tetanus pertussis; Non specific effects of routine vaccinations; Observational studies; Simulations; Survival bias

Indexed keywords

BCG VACCINE; DIPHTHERIA PERTUSSIS TETANUS VACCINE;

CHILD MORTALITY; IMMUNIZATION; OBSERVATIONAL METHOD; SAMPLING BIAS; SIMULATION; SURVIVAL; TETANUS; VACCINATION;

ARTICLE; CHILDHOOD MORTALITY; COMPARATIVE STUDY; CONTROLLED STUDY; FOLLOW UP; GUINEA-BISSAU; HUMAN; IMMUNIZATION; INCIDENCE; INFANT; MAJOR CLINICAL STUDY; OBSERVATIONAL STUDY; PERTUSSIS; RETROSPECTIVE STUDY; RISK ASSESSMENT; SIMULATION; SURVIVAL; VACCINATION;

BCG VACCINE; BIAS (EPIDEMIOLOGY); CHILD; CHILD MORTALITY; COMPUTER SIMULATION; DIPHTHERIA-TETANUS-PERTUSSIS VACCINE; GUINEA-BISSAU; HUMANS; INFANT; INFANT MORTALITY; INFANT, NEWBORN; MODELS, BIOLOGICAL; RESEARCH DESIGN; RETROSPECTIVE STUDIES; SURVIVAL ANALYSIS; TIME FACTORS; VACCINATION;

AFRICA; GUINEA-BISSAU; SUB-SAHARAN AFRICA; WEST AFRICA;

EID: 33845746694     PISSN: 13602276     EISSN: 13653156     Source Type: Journal    
DOI: 10.1111/j.1365-3156.2006.01773.x     Document Type: Article

References (20)

1. Aaby P & Jensen H (2005) Commentary: contrary findings from Guinea-Bissau and Papua New Guinea. International Journal of Epidemiology 34, 149-151.
2. Aaby P, Garly ML, Balé C et al. (2002) Routine vaccinations and child survival in a war situation with high mortality: effect of gender. Vaccine 21, 15-20.
3. Aaby P, Jensen H, Samb B et al. (2003) Differences in female-male mortality after high-titre measles vaccine and association with subsequent vaccination with diphtheria-tetanus-pertussis and inactivated poliovirus: a re-analysis of the West African studies. Lancet 361, 2183-2188.
4. Aaby P, Jensen H, Gomes J et al. (2004a) The introduction of diphtheria-tetanus-pertussis vaccine and child mortality in rural Guinea-Bissau: an observational study. International Journal of Epidemiology 33, 374-380.
5. Aaby P, Jensen H, Rodrigues A et al. (2004b) Divergent female-male mortality ratios associated with different routine vaccinations among female-male twin pairs. International Journal of Epidemiology 33, 367-373.
6. Aaby P, Rodrigues A, Biai S et al. (2004c) Oral polio vaccination and low case fatality at the paediatric ward in Bissau, Guinea-Bissau. Vaccine 22, 3014-3017.
7. Aaby P, Gomez P, Jensen H et al. (2006) Age-specific changes in female-male mortality ratio related to the pattern of vaccinations: an observational study from rural Gambia. Vaccine 24, 4701-4708.
8. Anderson JR, Cain KC & Gelber RD (1983) Analysis of survival by tumor response. Journal of Clinical Oncology 1, 710-719.
9. Breiman RF, Streatfield PK, Phelan M et al. (2004) Effect of infant immunisation on childhood mortality in rural Bangladesh: analysis of health and demographic surveillance data. Lancet 364, 2204-2211.
10. Elguero E, Simondon KB, Vaugelade J et al. (2005) Non-specific effects of vaccination on survival? A prospective study in Senegal. Tropical Medicine & International Health 10, 956-960.
11. Global Advisory Committee on Vaccine Safety (2004) Effect of diphtheria-tetanus-pertussis (DTP) vaccination on child survival. Weekly Epidemiological Record 79, 271-272.
12. Jensen H, Benn CS & Aaby P (2005) DTP in low income countries: improved child survival or survival bias? British Medical Journal 330, 845-846.
13. Kristensen I, Aaby P & Jensen H (2000) Routine vaccinations and child survival: follow up study in Guinea-Bissau, West Africa. British Medical Journal 321, 1435-1438.
14. Lehmann D, Vail J, Firth MJ et al. (2005) Benefits of routine immunizations on childhood survival in Tari, Southern Highlands Province, Papua New Guinea. International Journal of Epidemiology 34, 138-148.
15. Moulton LH, Rahmathullah L, Halsey NA et al. (2005) Evaluation of non-specific effects of infant immunizations on early infant mortality in a southern Indian population. Tropical Medicine & International Health 10, 947-955.
16. Nyarko P, Pence B & Debpuur C (2001) Immunization Status and Child Survival in Rural Ghana. Population Council. Working papers No. 147, New York.
17. Rothman KJ & Greenland S (1998) Modern Epidemiology. Second Edition. Lippincott Williams & Wilkins, Philadelphia, PA.
18. Vaugelade J, Pinchinat S, Guielle G et al. (2004) Non-specific effects of vaccination on child survival: prospective cohort study in Burkina Faso. British Medical Journal 329, 1309-1311.
19. Veirum JE, Sodemann M, Biai S et al. (2005) Diphtheria-tetanus-pertussis and measles vaccinations associated with divergent effects on female and male mortality at the paediatric ward in Bissau, Guinea-Bissau. Vaccine 23, 1197-1204.
20. Velema JP, Alihonou EJ, Gandaho T et al. (1991) Childhood mortality among users and non-users of primary health care in a rural West African community. International Journal of Epidemiology 20, 474-479.