Table 5

Proportion of patients reporting complications by operation

Operation
NHS
ISTC
Adjusted odds ratio
95% CI
P-value






N (%)
N (%)




Cataract





     Bleeding
17 (3.4)
5 (2.2)
0.74
0.37 to 1.5
0.4
     Wound infection
18 (3.6)
2 (0.9)
0.13
0.02 to 1.0
0.05
     Urinary problems
12 (2.4)
1 (0.4)
0.26
0.03 to 2.5
0.2
     Adverse drug reaction
19 (3.8)
4 (1.7)
0.53
0.19 to 1.5
0.2
Hernia repair





     Bleeding
19 (5.9)
2 (4.2)
0.80
0.35 to 1.8
0.6
     Wound infection
35 (10.8)
4 (8.3)
0.58
0.33 to 1.0
0.06
     Urinary problems
20 (6.2)
3 (6.2)
0.82
0.43 to 1.5
0.5
     Adverse drug reaction
21 (6.5)
1 (2.1)
0.16
0.10 to 0.27
<0.001
Varicose vein surgery





     Bleeding
51 (25.5)
8 (22.2)
0.71
0.30 to 1.7
0.4
     Wound infection
50 (25.0)
9 (25.0)
1.2
0.74 to 2.0
0.4
     Urinary problems
7 (3.5)
1 (2.8)
1.2
0.46 to 3.3
0.7
     Adverse drug reaction
10 (5.0)
0 (0)
1.0
0.94 to 1.0
0.7
Hip replacment





     Bleeding
27 (10.5)
10 (7.1)
0.88
0.47 to 1.7
0.7
     Wound infection
27 (10.5)
15 (10.6)
1.2
0.58 to 2.6
0.6
     Urinary problems
33 (12.8)
12 (8.5)
0.67
0.35 to 1.3
0.2
     Adverse drug reaction
29 (11.3)
15 (10.6)
0.84
0.39 to 1.8
0.6
Knee replacement





     Bleeding
25 (8.8)
7 (4.4)
0.45
0.14 to 1.4
0.2
     Wound infection
42 (14.8)
14 (8.8)
0.50
0.28 to 0.90
0.02
     Urinary problems
42 (14.8)
13 (8.2)
0.51
0.29 to 0.88
0.02
     Adverse drug reaction
39 (13.8)
16 (10.1)
0.65
0.43 to 0.97
0.04

Browne et al. BMC Health Services Research 2008 8:78   doi:10.1186/1472-6963-8-78