Maternal vitamin use and reduced risk of neuroblastoma.
BACKGROUND
Previous studies have suggested that maternal vitamin use during pregnancy may reduce the incidence of childhood brain tumors. Using data from a large North American study, we conducted an analysis to investigate maternal vitamin use and neuroblastoma in offspring.


METHODS
Cases were children diagnosed with neuroblastoma over the period 1 May 1992 to 30 April 1994 at Children's Cancer Group and Pediatric Oncology Group institutions throughout the United States and Canada. One matched control was selected for each case using random-digit dialing. We obtained vitamin use information during specific periods before and during pregnancy from 538 case and 504 control mothers through telephone interviews.


RESULTS
Daily vitamin and mineral use in the month before pregnancy and in each trimester was associated with a 30-40% reduction in risk of neuroblastoma. For example, daily use in the second trimester had an odds ratio of 0.6 (95% confidence interval = 0.4-0.9). We were unable to isolate the effects of specific vitamins or minerals. Neither age at diagnosis nor oncogene amplification status materially altered the results.


CONCLUSIONS
The results of this study suggest that vitamin use during pregnancy might reduce incidence of neuroblastoma, consistent with findings for other childhood cancers.
Olshan
Andrew F
AF
Department of Epidemiology, School of Public Health University of North Carolina, Chapel Hill, NC, USA. andy_olshan@unc.edu
Smith
Joanna C
JC
Bondy
Melissa L
ML
Neglia
Joseph P
JP
Pollock
Brad H
BH
D000293:Adolescent; D001932:Brain Neoplasms / Q000517:prevention & control*; D002648:Child; D002675:Child, Preschool; D019587:Dietary Supplements; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009447:Neuroblastoma / Q000517:prevention & control*; D016017:Odds Ratio; D016742:Preconception Care; D011247:Pregnancy; D011295:Prenatal Care; D012307:Risk Factors; D014815:Vitamins / Q000008:administration & dosage*
D014815:Vitamins