Z-scores and the birthweight paradox

Paediatric and Perinatal Epidemiology

Volumn 23, Issue 5, 2009, Pages 403-413

  Schisterman, Enrique F ^a   Whitcomb, Brian W ^a,b   Mumford, Sunni L ^a,c   Platt, Robert W ^d  

^a EUNICE KENNEDY SHRIVER NATIONAL INSTITUTE OF CHILD HEALTH AND HUMAN DEVELOPMENT   (United States)

^b UNIVERSITY OF MASSACHUSETTS   (United States)

^c IL   (United States)

^d MCGILL UNIVERSITY   (Canada)

Author keywords

Birthweight; Birthweight paradox; Directed acyclic graphs; Simulation; Z scores

Indexed keywords

ARTICLE; BIRTH WEIGHT; CAUSAL ATTRIBUTION; NEWBORN MORTALITY; RISK FACTOR; SCORING SYSTEM; SIMULATION; SMOKING; STATISTICAL ANALYSIS; STATISTICAL MODEL; Z SCORE;

BIRTH WEIGHT; CONFOUNDING FACTORS (EPIDEMIOLOGY); FEMALE; HUMANS; INFANT MORTALITY; INFANT, LOW BIRTH WEIGHT; INFANT, NEWBORN; MALE; MATERNAL BEHAVIOR; MODELS, STATISTICAL; RISK FACTORS; SMOKING; SOCIOECONOMIC FACTORS; UNITED STATES;

EID: 68849089209     PISSN: 02695022     EISSN: 13653016     Source Type: Journal    
DOI: 10.1111/j.1365-3016.2009.01054.x     Document Type: Article

References (35)

1. Basso O, Wilcox AJ, Weinberg CR. Birth weight and mortality: causality or confounding? American Journal of Epidemiology 2006 164 : 303 311.
2. Wilcox AJ. On the importance - and the unimportance - of birthweight. International Journal of Epidemiology 2001 30 : 1233 1241.
3. Wilcox AJ. Commentary: On the paradoxes of birthweight. International Journal of Epidemiology 2003 32 : 632 633.
4. MacDorman MF, Callaghan WM, Mathews TJ, Hoyert DL, Kochanek KD. Trends in preterm-related infant mortality by race and ethnicity, United States, 1999-2004. International Journal of Health Services 2007 37 : 635 641.
5. Mathews TJ, MacDorman MF. Infant mortality statistics from the 2004 period linked birth/infant death data set. National Vital Statistics Reports 2007 55 : 1 32.
6. Schisterman EF, Cole SR, Platt RW. Over-adjustment bias and unnecessary adjustment in epidemiologic studies. Epidemiology 2009 20 : 488 495.
7. Wilcox AJ. Birth weight and perinatal mortality: the effect of maternal smoking. American Journal of Epidemiology 1993 137 : 1098 1104.
8. Buekens P, Wilcox A. Why do small twins have a lower mortality rate than small singletons? American Journal of Obstetrics and Gynecology 1993 168 : 937 941.
9. Ananth CV, Wilcox AJ. Placental abruption and perinatal mortality in the United States. American Journal of Epidemiology 2001 153 : 332 337.
10. Wilcox AJ, Russell IT. Birthweight and perinatal mortality: II. On weight-specific mortality. International Journal of Epidemiology 1983 12 : 319 325.
11. Wilcox AJ, Russell IT. Birthweight and perinatal mortality: I. On the frequency distribution of birthweight. International Journal of Epidemiology 1983 12 : 314 318.
12. Wilcox AJ, Russell IT. Birthweight and perinatal mortality: III. Towards a new method of analysis. International Journal of Epidemiology 1986 15 : 188 196.
13. MacDorman MF, Atkinson JO. Infant mortality statistics from the linked birth/infant death data set - 1995 period data. Monthly Vital Statistics Reports 1998 46 : 1 22.
14. Hertz-Picciotto I, Din-Dzietham R. Comparisons of infant mortality using a percentile-based method of standardization for birthweight or gestational age. Epidemiology 1998 9 : 61 67.
15. Hertz-Picciotto I. Is it time to abandon adjustment for birth weight in studies of infant mortality? Paediatric and Perinatal Epidemiology 2003 17 : 114 116.
16. Joyce R, Peacock J. A comparison of methods of adjusting stillbirth and neonatal mortality rates for birthweight in hospital and geographical populations. Paediatric and Perinatal Epidemiology 2003 17 : 119 124.
17. Wilcox AJ, Weinberg CR. Invited commentary: analysis of gestational-age-specific mortality - on what biologic foundations? American Journal of Epidemiology 2004 160 : 213 214.
18. Wilcox AJ. Invited commentary: the perils of birth weight - a lesson from directed acyclic graphs. American Journal of Epidemiology 2006 164 : 1121 1123.
19. Greenland S, Schlesselman JJ, Criqui MH. The fallacy of employing standardized regression coefficients and correlations as measures of effect. American Journal of Epidemiology 1986 123 : 203 208.
20. Greenland S, Maclure M, Schlesselman JJ, Poole C, Morgenstern H. Standardized regression coefficients: a further critique and review of some alternatives. Epidemiology 1991 2 : 387 392.
21. Hernandez-Diaz S, Schisterman EF, Hernan MA. The birth weight 'paradox' uncovered? American Journal of Epidemiology 2006 164 : 1115 1120.
22. Hernandez-Diaz S, Wilcox AJ, Schisterman EF, Hernan MA. From causal diagrams to birth weight-specific curves of infant mortality. European Journal of Epidemiology 2008 23 : 163 166.
23. Cole SR, Hernan MA. Fallibility in estimating direct effects. International Journal of Epidemiology 2002 31 : 163 165.
24. Hernan MA, Hernandez-Diaz S, Robins JM. A structural approach to selection bias. Epidemiology 2004 15 : 615 625.
25. Robins JM, Greenland S. Identifiability and exchangeability for direct and indirect effects. Epidemiology 1992 3 : 143 155.
26. Wilcox AJ, Russell IT. Perinatal mortality: standardizing for birthweight is biased. American Journal of Epidemiology 1983 118 : 857 864.
27. Greenland S, Pearl J, Robins JM. Causal diagrams for epidemiologic research. Epidemiology 1999 10 : 37 48.
28. Hernan MA, Hernandez-Diaz S, Werler MM, Mitchell AA. Causal knowledge as a prerequisite for confounding evaluation: an application to birth defects epidemiology. American Journal of Epidemiology 2002 155 : 176 184.
29. Greenland S, Robins JM. Identifiability, exchangeability, and epidemiological confounding. International Journal of Epidemiology 1986 15 : 413 419.
30. Kaufman JS, MacLehose RF, Kaufman S. A further critique of the analytic strategy of adjusting for covariates to identify biologic mediation. Epidemiologic Perspectives and Innovations 2004 1 : 4.
31. Kaufman JS, MacLehose RF, Kaufman S, Greenland S. The mediation proportion. Epidemiology 2005 16 : 710.
32. Kaufman S, Kaufman JS, MacLehose RF, Greenland S, Poole C. Improved estimation of controlled direct effects in the presence of unmeasured confounding of intermediate variables. Statistics in Medicine 2005 24 : 1683 1702.
33. Petersen ML, Sinisi SE, van der Laan MJ. Estimation of direct causal effects. Epidemiology 2006 17 : 276 284.
34. Rothman KJ, Greenland S, Lash TL. Modern Epidemiology. Philadelphia, PA : Lippincott Williams and Wilkins, 2008.
35. Kramer MS. Determinants of low birth weight: methodological assessment and meta-analysis. Bulletin of the World Health Organization 1987 65 : 663 737.