| Determinant | Effect size | 95% CI | Q | I 2 | τ 2 | k |
|---|---|---|---|---|---|---|
| COVID‐related anxiety | r = 0.308*** | 0.154, 0.448 | 22.981 | 91% | 0.019 | 3 |
| COVID‐related worry | r = 0.381*** | 0.270, 0.482 | 35.762 | 92% | 0.014 | 4 |
| Perceived control | r = 0.185*** | 0.105, 0.262 | 7.013 | 57% | 0.004 | 4 |
| Attitudes | r = 0.264*** | 0.118, 0.399 | 84.743 | 94% | 0.033 | 6 |
| Self‐efficacy | r = 0.265*** | 0.146, 0.376 | 48.718 | 90% | 0.021 | 6 |
| Perceived effectiveness | r = 0.186*** | 0.090, 0.278 | 9.390 | 79% | 0.006 | 3 |
| Perceived risk | r = 0.202*** | 0.155, 0.248 | 2.237 | 0% | 0 | 5 |
| Perceived severity | r = 0.006 | −0.011, 0.023 | 0.319 | 0% | 0 | 3 |
| Perceived susceptibility | r = 0.041 | −0.034, 0.115 | 57.268 | 93% | 0.006 | 5 |
| Social norms | r = 0.291*** | 0.138, 0.431 | 34.509 | 91% | 0.025 | 4 |
| Knowledge about behaviour | r = 0.261* | 0.007, 0.484 | 60.292 | 97% | 0.051 | 3 |
| Knowledge about the disease | r = 0.337*** | 0.238, 0.428 | 65.716 | 92% | 0.016 | 6 |
Abbreviations: CI, confidence interval; I 2, percentage of variability due to between‐study heterogeneity; k, number of effect sizes; Q, test for heterogeneity; r, correlations; SMD, standardised mean difference; τ 2, random effects variance component.
*p < 0.05
***p < 0.001.