Table 1.
Summary of the characteristics of the 38 included systematic reviews.
| Total | AMSTAR rating |
||||
|---|---|---|---|---|---|
| High | Moderate | Low | Critically Low | ||
| Number of reviews (%) | 38 | 3 (8) | 1 (2) | 6 (16) | 28 (74) |
| Location, n (%) | |||||
| North America | 4 (11) | 1 (25) | 1 (25) | 0 (0) | 2 (50) |
| South America | 4 (11) | 1 (25) | 0 (0) | 0 (0) | 3 (75) |
| Europe | 14 (37) | 1 (7) | 0 (0) | 3 (21) | 10 (71) |
| Asia | 4 (11) | 0 (0) | 0 (0) | 0 (0) | 4 (100) |
| Oceania | 12 (32) | 0 (0) | 0 (0) | 3 (25) | 9 (75) |
| Impact factor of the journal, mean (SD) | 2.3 (1.7) | 5.9 (0.2) | 2.8 | 3.2 (1.5) | 1.7 (1.2) |
| Cochrane review, n (%) | 5 (13) | 3 (60) | 1 (20) | 1 (20) | 0 (0) |
| Funding, n (%) | 10 (26) | 1 (10) | 0 (0) | 2 (20) | 7 (70) |
| Protocol published, n (%) | 8 (21) | 3 (38) | 1 (12) | 3 (38) | 1 (12) |
| Number of included trials in the review, median (IQR) | 10 (6–15) | 12 (11–19) | 61 | 11 (6–17) | 9 (5–14) |
| Total sample size, median (IQR) | 813 (502–1585) | 1080 (795–2742) | 6390 | 966 (493–1586) | 777 (479–1277) |
| Type of exercise therapy, n (%) | |||||
| General exercise | 13 (34) | 0 (0) | 1 (8) | 2 (15) | 10 (77) |
| Motor control | 7 (18) | 0 (0) | 0 (0) | 2 (29) | 5 (71) |
| Pilates | 7 (18) | 1 (14) | 0 (0) | 0 (0) | 6 (86) |
| McKenzie | 5 (13) | 0 (0) | 0 (0) | 1 (20) | 4 (80) |
| Yoga | 3 (8) | 1 (33) | 0 (0) | 0 (0) | 2 (67) |
| Aerobic | 3 (8) | 1 (33) | 0 (0) | 0 (0) | 2 (67) |
| Graded activity | 2 (5) | 0 (0) | 0 (0) | 1 (50) | 1 (50) |
IQR, Interquartile range.