Table 1. Baseline characteristics and cancer follow-up by sex and categories of body mass index (BMI) in study participants (n = 326 387) compared to excluded subjects with missing BMI (n = 149 304) from 31 Asian cohorts in the Asia Pacific Cohort Studies Collaboration.

	Body mass index (kg/m2)
Asian cohorts	Missing	12.0-18.4	18.5-24.9	25.0-29.9	30.0-60.0
Males
No. of participants	118246	7209	143292	42947	1996
No. of cancer deaths	1008	287	2150	461	42
Person yrs, follow-up	871441	47860	801239	216162	10884
Age (yrs) at baseline, mean (SD)	41.9 (6.9)	52.3 (13.7)	46.5 (9.2)	46.7 (8.7)	49.4 (11.3)
BMI (kg/m2), mean (SD)	-	17.5 (0.9)	22.1 (1.7)	26.5 (1.2)	31.8 (2.6)
Weight (kg), mean (SD)	60.0 (9.0)	48.3 (4.7)	62.3 (6.6)	75.1 (6.1)	88.8 (9.6)
Height (m), mean (SD)	1.69 (0.05)	1.66 (0.07)	1.67 (0.06)	1.68 (0.06)	1.67 (0.07)
Smoking status (%)
Not current smoker	40.7	31.3	36.7	44.1	47.0
Current smoker	58.8	66.1	58.5	50.5	49.3
Unknown	0.5	2.6	4.7	5.4	3.7
Drinking status (%)
Not current drinker	75.1	44.5	32.5	30.3	41.3
Current drinker	24.2	49.6	61.6	64.1	54.2
Unknown	0.7	5.8	6.0	5.7	4.5
Females
No. of participants	31058	8355	96814	22861	2913
No. of cancer deaths	149	156	780	224	30
Person yrs, follow-up	239421	54565	550748	131004	17027
Age (yrs) at baseline, mean (SD)	41.1 (7.3)	48.3 (14.6)	45.1 (10.1)	49.2 (10.5)	52.1 (11.6)
BMI (kg/m2), mean (SD)	-	17.4 (0.9)	21.8 (1.7)	26.6 (1.3)	32.3 (2.8)
Weight (kg), mean (SD)	54.0 (8.5)	42.1 (4.3)	53.2 (5.6)	64.3 (5.6)	76.5 (8.8)
Height (m), mean (SD)	1.59 (0.05)	1.55 (0.06)	1.56 (0.06)	1.55 (0.06)	1.54 (0.07)
Smoking status (%)
Not current smoker	97.4	80.6	83.6	83.4	84.3
Current smoker	1.5	11.9	4.4	5.8	10.6
Unknown	1.1	7.5	11.9	10.8	5.0
Drinking status (%)
Not current drinker	95.0	82.6	80.1	81.1	86.0
Current drinker	3.8	7.6	9.2	8.6	7.3
Unknown	1.2	9.8	10.7	10.3	6.7

^*Sub-sample of participants with missing BMI, but available data on either weight or height