Table 3.
Random-effects univariate meta-regression analyses of covariates on weight loss (kg) in 20 randomised controlled trials with 21 arms.
| Covariates (Unit) | Univariate meta-regression | |||||
|---|---|---|---|---|---|---|
| β | SE | 95% CI | Z-value | P-value | ||
| Lower | Upper | |||||
| Year of publication (years) | 0.14 | 0.11 | −0.08 | 0.36 | 1.22 | 0.233 |
| Mean age (years) | −0.02 | 0.04 | −0.09 | 0.06 | −0.43 | 0.664 |
| Sample size (Number) | <0.001 | <0.001 | <−0.001 | 0.01 | 1.93 | 0.054 |
| Duration of intervention (weeks) | 0.03 | 0.01 | <0.001 | 0.05 | 2.25 | 0.024* |
| Attrition rate (%) | 0.02 | 0.04 | −0.05 | 0.10 | 0.60 | 0.551 |
β Regression coefficient, CI Confidence interval, SE Standard error; Z Z statistic.
*P < 0.05.