Table 3 Quality of evidence of ulcer recurrence
Outcome | Illustrative comparative risk | Relative effect (95% CI) | No of participants (studies) | Quality of evidence (GRADE) | |
|---|---|---|---|---|---|
Assumed risk Control | Corresponding risk Compression stockings | ||||
Comparison 1: Class 2 compared to class 1 (European standard) | |||||
Ulcer recurrence 12 months | 175 per 1000 | 84 fewer per 1000 (from 21 fewer to 122 fewer) | RR 0.52 (0.30, 0.88) | 399 [2] | Moderate1 ⊕ ⊕ ⊕⊙ |
Comparison 2: Class 3 compared to class 2 (European standard) | |||||
Ulcer recurrence 6 months | 143 per 1000 | 51 fewer per 1000 (from 114 fewer to 147 more) | RR 0.64 (0.20, 2.03) | 93 [1] | Very Low2 ⊕ ⊙ ⊙ ⊙ |
Comparison 3: Class 3 (European standard) compared to no stockings | |||||
Ulcer recurrence 12 months | 543 pr. 1000 | 310 fewer per 1000 (from 168 fewer to 397 fewer) | RR 0.43 (0.27, 0.69) | 153 [1] | Very Low3 ⊕ ⊙ ⊙ ⊙ |