Maternal diet quality before pregnancy and risk of childhood leukaemia

• Published in: British journal of nutrition Vol. 116; no. 8; pp. 1469 - 1478
• Main Authors: Singer, Amanda W., Carmichael, Suzan L., Selvin, Steve, Fu, Cecilia, Block, Gladys, Metayer, Catherine
• Format: Journal Article
• Language: English
• Published: Cambridge, UK Cambridge University Press 28.10.2016
• Subjects: Adolescent; Adult; California - epidemiology; Case-Control Studies; Child; Child, Preschool; Diet; Diet - adverse effects; Dietary Supplements; Dietary Surveys and Nutritional Epidemiology; Female; Fetal Development; Healthy Diet; Hospitals, Pediatric; Humans; Infant; Leukemia; Leukemia, Myeloid, Acute - epidemiology; Leukemia, Myeloid, Acute - etiology; Leukemia, Myeloid, Acute - prevention & control; Male; Maternal Nutritional Physiological Phenomena; Nutrients; Nutritional Status; Patient Compliance; Pediatrics; Precursor Cell Lymphoblastic Leukemia-Lymphoma - epidemiology; Precursor Cell Lymphoblastic Leukemia-Lymphoma - etiology; Precursor Cell Lymphoblastic Leukemia-Lymphoma - prevention & control; Pregnancy; Risk; Risk factors; Risk reduction; Self Report; Vitamins - therapeutic use; Young Adult; Prenatal nutrition; Childhood leukaemia; Diet quality; Epidemiology; ALL acute lymphoblastic leukaemia; HEI healthy eating index; AML acute myeloid leukaemia
• ISSN: 0007-1145; 1475-2662
• DOI: 10.1017/S0007114516003469

Previous studies on maternal nutrition and childhood leukaemia risk have focused on the role of specific nutrients such as folate and have not considered broader measures of diet quality, which may better capture intake of diverse nutrients known to impact fetal development. We examined the relationship between maternal diet quality before pregnancy, as summarised by a diet quality index, and risk of childhood acute lymphoblastic leukaemia (ALL) and acute myeloid leukaemia (AML) in a case–control study in California. Dietary intake in the year before pregnancy was assessed using FFQ in 681 ALL cases, 103 AML cases and 1076 matched controls. Conditional logistic regression was used to estimate OR and 95 % CI for diet quality continuous score and quartiles (Q1–Q4). Higher maternal diet quality score was associated with reduced risk of ALL (OR 0·66; 95 % CI 0·47, 0·93 for Q4 v. Q1) and possibly AML (OR 0·42; 95 % CI 0·15, 1·15 for Q4 v. Q1). No single index component appeared to account for the association. The association of maternal diet quality with risk of ALL was stronger in children diagnosed under the age of 5 years and in children of women who did not report using vitamin supplements before pregnancy. These findings suggest that the joint effects of many dietary components may be important in influencing childhood leukaemia risk.