Table 6 Quality assessment of the grade of evidence of the observational studies comparing TKA with – and without prior HTO
From: Total knee arthroplasty after high tibial osteotomy. A systematic review
| Â | Â | Quality assessment | Â | Â | Â | Summary of findings | |||
|---|---|---|---|---|---|---|---|---|---|
| Â | Â | Â | Â | Â | No of knees | Effects | Â | Â | |
No of studies | Design | Quality | Consistency | Directness | HTO | no HTO | Â | Quality | Importance |
Range of motion (6) | |||||||||
| Â | observational | no serious limitations | no important inconsistency | direct | 251 | 251 | 4/6 studies no difference | low | critical |
Knee clinical scores (9) | |||||||||
| Â | observational | no serious limitations | no important inconsistency | direct | Â | Â | Â | low | critical |
HSS (5/9) | Â | Â | Â | Â | 212 | 212 | 5/5 studies no difference | Â | Â |
KSS (5/9) | Â | Â | Â | Â | 175 | 176 | 4/5 study no difference | Â | Â |
other (3/9) | Â | Â | Â | Â | 106 | 105 | 2/3 studies no difference | Â | Â |
Revision surgery because of (a)septic loosening (8) | |||||||||
| Â | observational | no serious limitations | no important inconsistency | direct | 298 | 296 | 8/8 studies no difference | low | critical |