title: Body size, recreational physical activity, and B-cell non-Hodgkin lymphoma risk among women in the California teachers study.
abstract: Nutritional status and physical activity are known to alter immune function, which may be relevant to lymphomagenesis. The authors examined body size measurements and recreational physical activity in relation to risk of B-cell non-Hodgkin lymphoma (NHL) in the prospective California Teachers Study. Between 1995 and 2007, 574 women were diagnosed with incident B-cell NHL among 121,216 eligible women aged 22-84 years at cohort entry. Multivariable-adjusted relative risks and 95% confidence intervals were estimated by fitting Cox proportional hazards models for all B-cell NHL combined and for the 3 most common subtypes: diffuse large B-cell lymphoma, follicular lymphoma, and B-cell chronic lymphocytic leukemia/small lymphocytic lymphoma. Height was positively associated with risk of all B-cell NHLs (for >1.70 vs. 1.61-1.65 m, relative risk = 1.50, 95% confidence interval: 1.16, 1.96) and chronic lymphocytic leukemia/small lymphocytic lymphoma (relative risk = 1.93, 95% confidence interval: 1.09, 3.41). Weight and body mass index at age 18 years were positive predictors of B-cell NHL risk overall. These findings indicate that greater height, which may reflect genetics, early life immune function, infectious exposures, nutrition, or growth hormone levels, may play a role in NHL etiology. Adiposity at age 18 years may be more relevant to NHL etiology than that in later life.
authors.affiliation: Division of Cancer Etiology, Department of Population Science, City of Hope National Medical Center, Duarte, California 91010, USA. yalu@coh.org
authors.forename: Yani
authors.initials: Y
authors.lastname: Lu
authors.forename: Jennifer
authors.initials: J
authors.lastname: Prescott
authors.forename: Jane
authors.initials: J
authors.lastname: Sullivan-Halley
authors.forename: Katherine D
authors.initials: KD
authors.lastname: Henderson
authors.forename: Huiyan
authors.initials: H
authors.lastname: Ma
authors.forename: Ellen T
authors.initials: ET
authors.lastname: Chang
authors.forename: Christina A
authors.initials: CA
authors.lastname: Clarke
authors.forename: Pamela L
authors.initials: PL
authors.lastname: Horn-Ross
authors.forename: Giske
authors.initials: G
authors.lastname: Ursin
authors.forename: Leslie
authors.initials: L
authors.lastname: Bernstein
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015992:Body Mass Index; D049628:Body Size; D002140:California / Q000453:epidemiology; D015331:Cohort Studies; D016001:Confidence Intervals; D005260:Female; D006801:Humans; D008019:Life Style; D016393:Lymphoma, B-Cell / Q000453:epidemiology*; D008875:Middle Aged; D009043:Motor Activity; D015999:Multivariate Analysis; D009752:Nutritional Status; D011446:Prospective Studies; D011998:Recreation; D012306:Risk; D012307:Risk Factors; D011795:Surveys and Questionnaires; D049629:Waist-Hip Ratio