Validating survey measurement scales for AIDS-related knowledge and stigma among construction workers in South Africa

BMC Public Health

Table 2 Characteristics of participants in the random split sub-samples A (n = 224) and B (n = 233); depicts the demographic characteristics, and the AIDS- related knowledge and stigma scale statistics for sub-samples A and B

Characteristics	Sample		Sub-sample A		Sub-sample B
	(n = 457)		(n = 224)		(n = 233)
	n	%	n	%	n	%
Demographic characteristics
Age in years^c	M = 36.09	SD = 10.95	M = 37.09	SD = 11.11	M = 35.16	SD = 10.74
Gender^b
Male	414	91	197	89	217	93
Female	40	9	24	11	16	7
Race/ethnicity^b
‘Others’	185	41	91	41	94	41
‘Black’ African’	270	59	132	59	138	59
Level of education^a
Primary or less	121	26	65	29	56	24
Secondary	245	54	110	49	135	59
Tertiary or higher	91	20	49	22	42	18
Nature of employment^a,d
Permanent	271	61	146	68	125	55
Temporary/Contract	152	34	65	30	87	38
Casual	21	5	5	2	16	7
Language^a
English	197	43	92	41	105	45
Afrikaans	67	15	35	16	32	14
isiXhosa	193	42	97	43	96	41
HIV/AIDS-related characteristics
Tested for HIV^b	339	74	167	75	172	74
HIV + ^b	31	10	14	9	17	10
Behavioural characteristics
AIDS-related knowledge ^c	*Mean*	SD	*Mean*	SD	*Mean*	SD
Knowledge score (Range 0–11)	7.93	2.85	7.96	2.96	7.90	2.76
AIDS-related stigma ^c	*Mean*	SD	*Mean*	SD	*Mean*	SD
Stigma score (Range 0–9)	1.69	1.80	1.70	1.86	1.68	1.74

Notes: ^aThe Chi-square test for independence or the ^bFisher’s Exact Test was used for categorical variables, and the ^cIndependent Samples ‘t’ Test was used for continuous variables. ^dNo differences were found between sub-sample characteristics and means, except for nature of employment; with sub-sample A containing a higher proportion of permanent workers than did sub-sample B