Association Between Perinatal Factors and Childhood Lymphoma-A Pooled Analysis of the ESCALE and ESTELLE Studies (SFCE).
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CONTEXT: There is much interest in the perinatal period in relation to childhood cancer aetiology, with most studies focussing on childhood leukaemia. This work aimed to investigate the associations between pregnancy-related and perinatal factors and childhood lymphoma. METHODS: We conducted a pooled analysis of two French nationwide population-based case-control studies. Data on sociodemographic, perinatal and lifestyle factors were collected through maternal interviews. Odds ratios (OR) and 95% confidence intervals (CIs) were computed using adjusted logistic regression models, separately for non-Hodgkin lymphoma (NHL) and Hodgkin lymphoma (HL). Specific analyses also investigated Burkitt NHL and nodular sclerosis HL, two most common histological types in children. RESULTS: We included 305 NHL, 328 HL and 2415 controls in this study. No associations were observed with gestational age, foetal growth indicators, folic acid supplementation, factors related to maternal fertility and reproductive history, or maternal smoking during pregnancy. Maternal coffee consumption during pregnancy was associated with NHL (>2 cups/day, OR = 1.5 [95% CI: 1.1-2.1]), with a dose-response relationship; while maternal alcohol consumption was associated with Burkitt NHL (OR = 1.5 [1.1-2.2]). Paternal smoking during preconception/pregnancy was associated with NHL (OR = 1.4 [1.1-1.8]). Breastfeeding (ever/never) was not significantly associated with NHL and HL, but an inverse log-linear trend was observed with the duration of breastfeeding for NHL (p = 0.04). CONCLUSION: Maternal coffee and alcohol consumptions during pregnancy and paternal smoking during preconception/pregnancy might increase the risk of childhood NHL. While warranting replication, these findings could help us better understand the aetiology of childhood lymphoma.