Physical and emotional health outcomes after 12 months of public-sector antiretroviral treatment in the Free State Province of South Africa: a longitudinal study using structural equation modelling

Table 1 Item analysis, goodness-of-fit, and reliability assessment of the measurement model (n = 268)

Scale	Standardized Loadings¹	t Value
Physical QoL
Mobility	0.787***	13.883
Usual activities	0.936***	34.920
Pain	0.829***	20.995
Self-care	0.938***	23.281
Emotional QoL
Satisfaction with life	0.730***	10.561
Pleasant affect	0.946***	11.394
Absence of unpleasant affect	0.798***	7.975
Test for Fit	Measurement Model	Criteria for Good Fit
RMSEA	0.0312	< 0.05
Normed Fit Index (NFI)	0.985	> 0.9
Non-Normed Fit Index (NNFI)	0.993	> 0.9
Comparative Fit Index (CFI)	0.996	> 0.9
Reliability		Criteria for Reliability
Composite reliability (Phys. QoL)	0.892	> 0.7
Composite reliability (Emo. QoL)	0.829	> 0.7
Validity		Criteria for Validity
χ² difference test	42.115 (1); P < 0,001	P < 0.05
Extracted variance test (Phys. QoL)	0.881	> 0.5
Extracted variance test (Emo. QoL)	0.812	> 0.5

*** P < 0.001
¹The standardized factor loading is the standardized regression coefficient of the latent variable on the indicator (the measured variable). Squaring the factor loading gives us the percentage of variance of the measured variable explained by the latent variable.

ISSN: 1471-2458