Table 1 The characteristics of included studies
Study | Year | Country | Patients (n) | Age (years) | Study design | Diagnosis | Quality score | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
C | IA | IV | C | IA | IV | ||||||
Huang ZY | 2014 | China | 92 | 92 | 65.4 ± 8.7 | 64.7 ± 9.5 | RCT | OA | 4 | ||
Jain NP | 2016 | India | 59 | 60 | 68.2 ± 8.66 | 70.0 ± 6.56 | RCT | OA | 5 | ||
Lin SY | 2015 | Taiwan | 40 | 40 | 70.7 ± 8.2 | 71.0 ± 7.2 | RCT | OA | 4 | ||
Nielsen CS | 2016 | Denmark | 30 | 30 | 65.5 ± 7.8 | 63.2 ± 8.6 | RCT | OA | 7 | ||
Song EK | 2016 | Korea | 50 | 50 | 50 | 70.8 ± 6.8 | 69.8 ± 6.8 | 69.2 ± 6.4 | RCT | OA | 7 |