| Number of studies | Number of participants | Risk ratio (95% confidence interval) | p-value for sub-category | Overall p-value |
---|---|---|---|---|---|
Hypertension definition | Â | Â | Â | Â | 0.002 |
 Includes systolic blood pressure ≥ 140 mmHg or diastolic blood pressure ≥ 90 mmHg and/or use of antihypertensives | 41 | 148,868 | 1 | – |  |
 Electronic health records | 11 | 10,941,001 | 1.04 (0.87–1.24) | 0.643 |  |
 Other | 7 | 11,712 | 0.97 (0.80–1.17) | 0.748 |  |
Continent | Â | Â | Â | Â | 0.657 |
 Africa | 22 | 112,005 | 1 | – |  |
 Asia | 2 | 1162 | 1.06 (0.74–1.50) | 0.763 |  |
 Europe | 13 | 53,680 | 1.20 (1.03–1.40) | 0.019 |  |
 North America | 18 | 10,932,964 | 1.45 (1.21–1.74) | < 0.001 |  |
 South America | 4 | 1770 | 1.13 (0.89–1.43) | 0.327 |  |