Table 2.

GEE marginal expectation model of WHOQOL-BREF domains (cell values are beta regression coefficients ± standard error)

Covariates	Physical activity domain	Psychological domain	Social relationships domain	Environmental domain
Gender	0.89 ± 0.19	−1.16 ± 0.31	1.22 ± 0.20	0.98 ± 0.33
Age	11.79 ± 0.91	3.81 ± 1.01	−1.41 ± 1.09 ns	1.65 ± 1.25 ns
Time	−0.76 ± 0.54 ns	2.96 ± 0.52	2.93 ± 0.60	1.34 ± 0.62
Education	2.74 ± 0.96	5.48 ± 1.25	−3.49 ± 1.16 ns	−2.22 ± 1.30 ns
Marital status	0.12 ± 0.1 ns	0.07 ± 0.22 ns	−0.18 ± 0.11 ns	−0.28 ± 0.20 ns
Time * Age	0.32 ± 0.14	−0.95 ± 0.15	−0.28 ± 0.17	−0.11 ± 0.16 ns
Time * Education	0.54 ± 0.15	0.57 ± 0.17	−0.68 ± 0.19	−0.05 ± 0.18 ns
GEE model constant	57.55 ± 0.85	60.18 ± 1.12	70.68 ± 1.03	61.56 ± 1.16

All coefficient values are statistically significant unless otherwise specified (ns = not significant).