Table 2a. Mean pre- and postoperative scores and postoperative change for each activity.

Activity	Number of responses	Mean pre-op score (SD)	Mean post-op score (SD)	Mean post-op change	t-test	P-value
Reading	15	2.87 (1.51)	1.07 (0.26)	1.80	4.592	<0.001
Watching TV	15	2.87 (1.13)	1.07 (0.26)	1.80	6.061	<0.001
Walking without assistance	15	1.40 (0.83)	1.00 (0.00)	0.40	1.869	<0.10
Playing sport	13	2.92 (1.19)	1.21 (0.58)	1.69	4.870	<0.001
Fine manual work	15	3.37 (1.06)	1.40 (0.63)	2.07	5.766	<0.001
Working with a computer	14	3.21 (0.97)	1.20 (0.41)	2.00	6.734	<0.001
Performing housework and kitchen chores	14	2.57 (1.09)	1.07 (0.26)	1.50	5.155	<0.001
Reading road signs above or seeing traffic lights	14	2.47 (1.36)	1.21 (0.58)	1.36	3.666	<0.01
Reading signs at side of road while driving	15	2.60 (1.59)	1.33 (0.49)	0.13	2.947	<0.02
Performing occupation	12	2.33 (1.30)	1.27 (0.46)	1.00	3.067	<0.01
Hanging or reaching objects above	13	2.79 (1.31)	1.21 (0.43)	1.69	4.092	<0.01
Other	8	2.75 (1.04)	1.33 (0.65)	1.25	3.049	<0.02