Table 4.

Quality of Life in Patients Undergoing Bilateral Versus Unilateral Surgery Following Implantation of a Clear or Yellow Intra-Ocular Lens

	First surgery	Second surgery	Bilateral	p valuea
Clear IOL
No. patients	37	9	25
Male/female	18/19	3/6	9/16
Age (years)	74.5±9.1	69.2±9.2	75.2±7.9	NS
VFQ-25 score
Pre-operative	67.3±18.2	69.4±10.6	64.6±16.1	NS
Post-operativeb	77.7±13.2	83.0±11.0	82.0±11.9	NS
Changec	10.4	13.6	17.4
PSQI score
Pre-operative	5.6±4.1	5.9±2.7	5.7±2.5	NS
Post-operativeb	5.5±3.6	5.4±2.6	5.2±3.2	NS
Changec	−0.1	−0.5	−0.5
Yellow IOL
No. patients	31	19	85
Male/female	13/18	5/14	35/50
Age (years)	73.8±7.7	72.3±7.9	75.2±7.7	NS
VFQ-25 score
Pre-operative	61.2±19.3	68.3±13.2	63.4±16.6	NS
Post-operativeb	78.2±13.4	80.2±11.0	80.7±11.8	NS
Changec	17.0	11.9	17.3
PSQI score
Pre-operative	4.8±4.4	5.8±3.3	5.3±3.6	NS
Post-operativeb	5.2±3.9	6.3±4.4	5.0±3.5	NS
Changec	0.4	0.5	−0.3

Unless indicated otherwise, data are given as the mean±standard deviation (SD).

^aKruskal–Wallis test.

^bNote, postoperative values are values determined 2 months after surgery.

^cThe change in scores was calculated by subtracting preoperative values from postoperative values.

IOL, intra-ocular lens; NS, not significant; VFQ-25, Visual Function Questionnaire 25; PSQI, Pittsburgh Sleep Quality Index.