Table 4 Multiple linear regression analysis of potential factors affecting the methodologic quality of SRs/MAs of CP/CPPS (N = 45)
Characteristics | Coefficients | 95% CI | P value |
|---|---|---|---|
Publication year (Before 2010) | |||
 After 2010 | 0.333 | -0.159, 0.826 | 0.177 |
Continent (Asia) | Â | Â | Â |
 Europe | 0.481 | -0.040, 1.002 | 0.069 |
 North America | -0.064 | -0.557, 0.429 | 0.793 |
 South America | -0.299 | -1.315, 0.718 | 0.554 |
PISMA (No) | Â | Â | Â |
 Yes | -0.105 | -0.510, 0.300 | 0.602 |
Preregistration (No) | Â | Â | Â |
 Yes | 0.231 | -0.138, 0.600 | 0.212 |
Funding support (No) | Â | Â | Â |
 Yes | -0.059 | -0.416, 0.297 | 0.737 |
RCT enrollment (non-RCTs) | Â | Â | Â |
 RCTs and non-RCTs | -0.272 | -0.808, 0.264 | 0.309 |
 RCTs | -0.176 | -0.624, 0.272 | 0.430 |
Whether CDSR (non-CDSR) | Â | Â | Â |
 CDSR | 0.532 | -0.193, 1.257 | 0.145 |
Meta-analysis (Without) | Â | Â | Â |
 With | 0.041 | -0.518, 0.600 | 0.882 |