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Maternal cured meat consumption during pregnancy and risk of paediatric brain tumour in offspring: potentially harmful levels of intake

Published online by Cambridge University Press:  27 September 2007

Janice M Pogoda  and
Susan Preston-Martin
Janice M Pogoda*
Affiliation:
Statology, 10355 Pine Cone Way, Truckee, CA 96161, USA
Susan Preston-Martin
Affiliation:
University of Southern California (USC), Department of Preventive Medicine, USC/Norris Comprehensive Cancer Center, Los Angeles, CA 90033-0800, USA
*
*Corresponding author: Email [email protected]
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Abstract

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Objective

To describe the relationship between specific levels of nitrite intake from cured meat consumption during pregnancy and the relative risk of paediatric brain tumours in the offspring.

Design

Exposure data were previously collected for a population-based case–control study of paediatric brain tumours; data on nitrite content were obtained by a comprehensive literature review of surveys of residual nitrite content in cured meats published in the USA and Canada. The level of nitrite intake for each mother was predicted by year of pregnancy based on survey results. Dose–response was evaluated both categorically and continuously using polynomial and quadratic spline regression.

Setting

The US west coast: Los Angeles County, the San Francisco–Oakland Bay Area and the Seattle–Puget Sound area.

Subjects

There were 540 cases diagnosed between 1984 and 1990 at ages varying from 0 to 19 years, and 801 controls frequency-matched by geographic area, age and birth year.

Results

In general, survey results suggest a trend of decreasing nitrite levels in cured meats over time. We observed a moderate increase in brain tumour risk in the offspring of mothers with relatively low levels of nitrite consumption from cured meats during pregnancy, and a two- to three-fold risk increase in offspring of mothers who consumed 3 mg day−1 nitrite from cured meats (about 125 g day−1 of cured meat consumption throughout the pregnancy).

Conclusions

A substantial risk of paediatric brain tumour appears to be associated with relatively high levels of maternal cured meat consumption during pregnancy. A more scientifically valid approach than a literature review to estimate nitrite intake from cured meats and data from a large group of highly exposed subjects would be useful in determining potentially harmful levels.

Keywords

Sodium nitriteCured meat productsDiet surveysBrain tumoursN-nitroso compoundsChildhood neoplasms
Type
Research Article
Information
Public Health Nutrition , Volume 4 , Issue 2 , April 2001 , pp. 183 - 189
Copyright
Copyright © CABI Publishing 2001

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