Birmann, BM;Andreotti, G;De Roos, AJ;Camp, NJ;Chiu, BCH;Spinelli, JJ;Becker, N;Benhaim-Luzon, V;Bhatti, P;Boffetta, P;Brennan, P;Brown, EE;Cocco, P;Costas, L;Cozen, W;de Sanjose, S;Foretova, L;Giles, GG;Maynadie, M;Moysich, K;Nieters, A;Staines, A;Tricot, G;Weisenburger, D;Zhang, YW;Baris, D;Purdue, MP

2017

June

Cancer Epidemiology Biomarkers and Prevention

Young Adult and Usual Adult Body Mass Index and Multiple Myeloma Risk: A Pooled Analysis in the International Multiple Myeloma Consortium (IMMC)

Published

()

GROWTH-FACTOR-I NON-HODGKIN-LYMPHOMA MONOCLONAL GAMMOPATHY ANTHROPOMETRIC CHARACTERISTICS UNDETERMINED SIGNIFICANCE UNITED-STATES MEDICAL CONDITIONS CIGARETTE-SMOKING CELL-GROWTH CANCER

26

876

885

Background: Multiple myeloma risk increases with higher adult body mass index (BMI). Emerging evidence also supports an association of young adult BMI with multiple myeloma. We undertook a pooled analysis of eight case-control studies to further evaluate anthropometric multiple myeloma risk factors, including young adult BMI. Methods: We conducted multivariable logistic regression analysis of usual adult anthropometric measures of 2,318 multiple myeloma cases and 9,609 controls, and of young adult BMI (age 25 or 30 years) for 1,164 cases and 3,629 controls. Results: In the pooled sample, multiple myeloma risk was positively associated with usual adult BMI; risk increased 9% per 5-kg/m(2) increase in BMI [OR, 1.09; 95% confidence interval (CI), 1.04-1.14; P = 0.007]. We observed significant heterogeneity by study design (P = 0.04), noting the BMI-multiple myeloma association only for population-based studies (Ptrend = 0.0003). Young adult BMI was also positively associated with multiple myeloma (per 5-kg/m(2); OR, 1.2; 95% CI, 1.1-1.3; P = 0.0002). Furthermore, we observed strong evidence of interaction between younger and usual adult BMI (P-interaction<0.0001); we noted statistically significant associations with multiple myeloma for persons overweight (25-<30 kg/m(2)) or obese (30+ kg/m(2)) in both younger and usual adulthood (vs. individuals consistently <25 kg/m(2)), but not for those overweight or obese at only one time period. Conclusions: BMI-associated increases in multiple myeloma risk were highest for individuals who were overweight or obese throughout adulthood.

PHILADELPHIA

1055-9965

10.1158/1055-9965.EPI-16-0762-T