Table 2. The quality of life in DR patients or control subjects, as determined on the 8 subscales of SF-36 Questionnaire.

	Patients		Controls		Two-factorial analysis of variance
	NPDR	PDR	C- NPDR	C- PDR	Dx	P/C	Dx×P/C
Body health	70.12±20.75	57.33±14.76	76.72±19.54	77.24±17.89	1.5	12.6b	1.9
Body role function	46.12±42.16	36.25±32.68	52.11±22.84	53.53±20.64	1.7	3.9a	0.2
Body pain	68.32±24.16	59.74±18.77	70.64±20.09	71.32±20.46	0.6	2.2	0.9
General health	47.74±14.64	38.13±10.94	57.88±19.76	55.39±19.81	4.2	8.2b	0.6
Vigour	60.55±19.98	51.62±15.79	62.14±14.23	64.24±13.92	4.4	2.1	1.2
Social function	64.33±19.94	55.24±15.35	66.32±20.11	66.86±21.42	1.1	9.8b	0
Emotion role function	48.34±37.35	40.11±32.67	56.24±36.21	56.64±36.52	4.9a	14.3b	0
Mental health	60.11±18.84	49.11±12.32	67.76±18.92	65.59±18.13	2.3	12.6b	1.4

Dx: diagnosis; P/C: patients vs respective controls; ^aP<0.05, ^bP<0.01 vs controls.