Table 1.

Characteristics of participants in South Asia Biobank (SAB), compared with reported national population distribution (United Nations Population Division)

Demographic characteristic	Bangladesh			India			Pakistan			Sri Lanka
	National	SAB (n = 13 954)	P-value	National	SAB (n = 18 089)	P-value	National	SAB (n = 5875)	P-value	National	SAB (n = 14935)	P-value
Age			<0.001			<0.001			<0.001			<0.001
<30 years	30.28	15.71		28.53	13.07		34.32	15.74		21.17	10.56
30-50 years	45.24	50.61		42.93	47.95		41.66	51.56		40.89	39.17
50-70 years	19.08	29.25		23.09	33.37		19.04	30.88		29.98	40.74
≥70 years	5.40	4.44		5.45	5.62		4.98	1.82		7.96	9.53
Sex			<0.001			<0.001			<0.001			<0.001
Male	50.45	55.43		51.57	61.53		51.11	67.09		47.18	69.07
Female	49.55	44.57		48.43	38.47		48.89	32.91		52.82	30.93

Data are in percentages. The age category of ‘<30 years’ refers to ‘20–29 years’ in the United Nations Population Division and ‘18–29 years’ in SAB; chi- square goodness of fit testing was used to determine whether the age and sex proportions in SAB were similar to those in the general population.