Metaregression analysis of the relationship between outcomes and characteristics of RCTs
| Outcome | Substudies (n) | Factor | Coefficient | z | p Value |
|---|---|---|---|---|---|
| HbA1c | 18 | Sample size | 0.0004 | 1.0535 | 0.2921 |
| History of diabetes | 0.2559 | 2.0006 | 0.0454 | ||
| Follow-up | −0.0081 | −1.5508 | 0.1210 | ||
| Publication year | −0.0079 | −0.6481 | 0.5169 | ||
| BMI | 9 | Sample size | 0.0034 | 1.1169 | 0.2640 |
| History of diabetes | 1.9653 | 3.4234 | 0.0006 | ||
| Follow-up | −0.0705 | −2.3762 | 0.0175 | ||
| Publication year | −0.1805 | −1.4780 | 0.1394 | ||
| TC | 8 | Sample size | −0.0001 | −0.3244 | 0.7456 |
| History of Diabetes | −0.0249 | −0.2167 | 0.8284 | ||
| Follow-up | 0.0011 | 0.2634 | 0.7923 | ||
| Publication year | −0.0021 | −1.2347 | 0.2169 |
BMI, body mass index; HbA1c, glycated haemoglobin; TC, total cholesterol.