Table 3.

Crossover audio computer-assisted self-interviewing versus computer-assisted personal interviewing comparison study: demographic characteristics for audio computer-assisted self-interviewing first versus computer-assisted personal interviewing first.

Country	Sex					Age (years)
	Male		Female		P value^a	Age (years)
	Count	%	Count	%	P value^a	Median	Range	P value^a
China (N = 199)
ACASI first	55/100	55	45/100	45	1.0	28	18–40	0.3
CAPI first	54/99	55	45/99	45		30	18–40
India (N = 63)
ACASI first	13/29	45	16/29	55	0.8	29	18–40	0.8
CAPI first	17/34	50	17/34	50		28.5	20–40
Peru (N = 69)
ACASI first	14/31	45	17/31	55	0.6	22	18–30	0.6
CAPI first	20/38	53	18/38	47		22	18–30
Russia (N = 60)
ACASI first	16/30	53	14/30	47	0.8	20	18–24	0.1
CAPI first	14/30	47	16/30	53		19	18–24
Zimbabwe (N = 54)
ACASI first	12/26	46	14/26	54	1.0	20	16–29	0.9
CAPI first	12/28	43	16/28	57		20	16–29

P value for a difference between the audio computer-assisted self-interviewing (ACASI) first and computer-assisted personal interviewing (CAPI) first groups on sex by Fisher’s exact test; on age by the Wilcoxon rank sum test.