Table 3.

Multilevel VFQ-39 and SF-36 models

	NEI VFQ-39								SF-36
	Composite score		Near activities		Distance activities		Role limitations		Physical component		Mental component
	Estimate	p value	Estimate	p value	Estimate	p value	Estimate	p value	Estimate	p value	Estimate	p value
Intercept	67.02	< 0.001	54.70	< 0.001	62.37	< 0.001	58.02	< 0.001	42.94	< 0.001	50.13	< 0.001
Male	2.21	0.024	3.40	0.014	3.36	0.012	3.49	0.030	0.56	0.383	0.21	0.739
Age	0.00	0.991	− 0.09	0.371	− 0.07	0.511	0.00	0.984	0.05	0.303	− 0.08	0.080
Time	2.91	0.071	8.83	< 0.001	5.13	0.018	1.63	0.551	− 0.88	0.412	3.20	0.003
Baseline	1.00	< 0.001	0.99	< 0.001	0.99	< 0.001	0.99	< 0.001	1.00	< 0.001	1.00	< 0.001
Time × baseline	− 0.32	< 0.001	− 0.29	< 0.001	− 0.31	< 0.001	− 0.38	< 0.001	− 0.28	< 0.001	− 0.54	< 0.001
Every 6 weeks	− 0.21	0.885	− 0.25	0.907	− 0.21	0.917	− 0.37	0.881	− 0.14	0.887	0.09	0.920
Time × 6 weeks	3.68	0.094	1.43	0.650	0.38	0.898	4.21	0.259	0.35	0.810	− 2.35	0.103
Every 8 weeks	− 0.13	0.930	− 0.14	0.946	− 0.20	0.920	− 0.18	0.942	− 0.12	0.900	0.16	0.869
Time × 8 weeks	2.15	0.338	− 2.41	0.452	1.66	0.580	4.53	0.234	0.63	0.670	− 0.54	0.715