. Author manuscript; available in PMC: 2015 Jan 1.

Published in final edited form as: Cancer Prev Res (Phila). 2013 Nov 26;7(1):33–41. doi: 10.1158/1940-6207.CAPR-13-0224

Table 2.

Selected characteristics at baseline^a in men and women by regular quantity of aspirin use.

	Adult strength tablets/week^b
	Men (HPFS; N=30,839)				Women (NHS; N=85,942)
	Non-user	<2	2–<5	≥5	Non-user	<2	2–<5	≥5
N (%)	10,111 (32.8)	13,594 (44.1)	5,049 (16.4)	2,085 (6.8)	49,402 (57.5)	12,334 (14.4)	8,711 (10.1)	15,495 (18.0)

Mean age, years	62.1	62.4	65.0	62.9	50.6	50.5	50.3	51.8

Mean BMI, kg/m²^c	25.1	25.5	25.7	25.7	24.9	24.9	25.1	25.5

Due to the use of a four-year lag, baseline for the analysis of cumulative average tablets/week of aspirin use is defined as 1996 in men and 1984 in women.

Calculated by converting reported usual dose and weekly quantity of tablets to 325-mg equivalents per week.

Standardized to the baseline age distribution of the specified cohort.

Abbreviations: HPFS, Health Professionals Follow-up Study; MM, multiple myeloma; NHS, Nurses’ Health Study; BMI, body mass index