. 2014 Oct 13;32(1):97–101. doi: 10.1111/dme.12593

Table 2.

Regression analyses relating Quality of Life scores to vision

					Incremental r² beyond age group, gender, HbA_1c group, race
	n	Mean score	sd	r² for fitting age group, gender, HbA_1c group, race	VA better eye		VA worse eye		0.75 VA better eye +0.25 VA worse eye		0.6 VA better eye +0.4 VA worse eye		0.5 VA better eye +0.5 VA worse eye
General health	289	41.1	22.5	0.040	0.031	0.0027	0.019	0.0197	0.033	0.0018	0.032	0.0021	0.030	0.0027
General vision	289	54.3	17.8	0.017	0.137	< 0.0001	0.098	< 0.0001	0.152	< 0.0001	0.152	< 0.0001	0.148	< 0.0001
Ocular pain	289	78.8	22.9	0.061	0.002	0.4884	0.007	0.1469	0.003	0.3195	0.004	0.2479	0.005	0.2134
Near activities	289	57.9	23.7	0.029	0.158	< 0.0001	0.094	< 0.0001	0.169	< 0.0001	0.164	< 0.0001	0.157	< 0.0001
Distant activities	289	63.5	24.7	0.022	0.192	< 0.0001	0.109	< 0.0001	0.202	< 0.0001	0.195	< 0.0001	0.185	< 0.0001
Vision-specific
Social functioning	289	79.3	23.2	0.052	0.128	< 0.0001	0.079	< 0.0001	0.138	< 0.0001	0.135	< 0.0001	0.129	< 0.0001
Mental health	289	55.9	28.3	0.089	0.098	< 0.0001	0.068	< 0.0001	0.109	< 0.0001	0.108	< 0.0001	0.105	< 0.0001
Role difficulties	289	54.4	28.3	0.059	0.080	< 0.0001	0.080	< 0.0001	0.097	< 0.0001	0.102	< 0.0001	0.102	< 0.0001
Dependency	289	68.4	31.3	0.109	0.094	< 0.0001	0.088	< 0.0001	0.113	< 0.0001	0.117	< 0.0001	0.117	< 0.0001
Driving	148	67.9	23.3	0.140	0.115	< 0.0001	0.070	0.0006	0.127	< 0.0001	0.127	< 0.0001	0.123	< 0.0001
Colour vision	287	86.2	21.9	0.024	0.022	0.0112	0.030	0.0032	0.030	0.0034	0.033	0.0021	0.034	0.0017
Peripheral vision	288	71.4	25.9	0.023	0.084	< 0.0001	0.095	< 0.0001	0.106	< 0.0001	0.114	< 0.0001	0.116	< 0.0001
Composite	289	66.2	19.2	0.060	0.160	< 0.0001	0.135	< 0.0001	0.186	< 0.0001	0.190	< 0.0001	0.188	< 0.0001
EQ5D	289	0.738	0.2	0.071	0.019	0.0160	0.033	0.0015	0.027	0.0038	0.032	0.0019	0.033	0.0014

Some items, e.g. driving have a response choice that indicates that the respondent does not perform the activity for reasons unrelated to vision. If a respondent selects this choice, the answer is treated as missing and an average of the remaining items is calculated. This is the reason for the reduced number in some domains.