Table 2. Incidence rates and 95%CI of hypertension according to population characteristics at baseline.
| Rural group | Migrant group | Urban group | |
|---|---|---|---|
| Sex | |||
| Female | 2.65 (1.57–4.48) | 2.14 (1.46–3.14) | 1.72 (0.77–3.83) |
| Male | 2.17 (1.13–4.18) | 0.97 (0.52–1.80) | 0.35 (0.05–2.52) |
| Age | |||
| 30–49 years | 1.98 (1.12–3.49) | 1.07 (0.65–1.77) | 0.95 (0.36–2.54) |
| 50+ years | 3.27 (1.81–5.91) | 2.49 (1.62–3.82) | 1.42 (0.46–4.39) |
| Education level | |||
| None/some primary school | 2.23 (1.30–3.85) | 2.48 (1.52–4.05) | — |
| Complete primary | 2.47 (0.93–6.58) | 1.36 (0.56–3.26) | 2.22 (0.31–15.78) |
| Some secondary | 3.03 (1.36–6.75) | 1.22 (0.74–2.03) | 1.10 (0.49–2.45) |
| Socioeconomic status | |||
| Lowest tertile | 1.95 (1.08–3.52) | 1.57 (0.93–2.65) | 1.82 (0.68–4.84) |
| Middle tertile | 1.52 (0.21–10.76) | 1.96 (1.11–3.45) | 0.53 (0.075–3.76) |
| Highest tertile | 3.53 (1.95–6.37) | 1.35 (0.73–2.50) | 0.90 (0.23–3.60) |
| Binge drinking | |||
| No | 2.42 (1.56–3.74) | 1.68 (1.21–2.34) | 1.22 (0.58–2.55) |
| Yes | 2.63 (0.85–8.16) | 0.60 (0.08–4.25) | — |
| Daily smoking | |||
| No | 2.35 (1.55–3.57) | 1.65 (1.19–2.28) | 1.18 (0.56–2.48) |
| Yes | 16.67 (2.35–118.32) | — | — |
| Physical activity | |||
| Moderate/high levels | 2.47 (1.64–3.72) | 1.67 (1.14–2.45) | 1.32 (0.55–3.18) |
| Low levels | — | 1.52 (0.82–2.82) | 0.79 (0.20–3.16) |
| Total cholesterol | |||
| <200 mg dl−1 | 2.18 (1.39–3.42) | 1.31 (0.84–2.06) | 1.02 (0.38–2.73) |
| ⩾200 mg dl−1 | 5.56 (2.09–14.80) | 2.13 (1.32–3.42) | 1.25 (0.40–3.88) |
| High waist circumference | |||
| No | 2.05 (1.26–3.35) | 0.89 (0.45–1.79) | 0.41 (0.06–2.93) |
| Yes | 4.67 (2.22–9.79) | 2.08 (1.44–3.01) | 1.56 (0.70–3.48) |
| Obesity | |||
| BMI <30 kg m−2 | 2.32 (1.51–3.55) | 1.45 (0.99–2.13) | 0.45 (0.11–1.82) |
| BMI ⩾30 kg m−2 | 5.56 (1.39–22.21) | 2.19 (1.18–4.07) | 2.62 (1.09–6.29) |
| Type 2 diabetes | |||
| No | 2.47 (1.64–3.72) | 1.52 (1.08–2.14) | 0.85 (0.35–2.05) |
| Yes | — | 3.95 (1.27–12.24) | 4.55 (1.14–18.17) |
| Pre-hypertension | |||
| No | 1.74 (0.93–3.23) | 0.99 (0.58–1.67) | 0.76 (0.24–2.34) |
| Yes | 3.55 (2.06–6.12) | 2.66 (1.75–4.04) | 1.71 (0.64–4.55) |
Abbreviations: BMI, body mass index; CI, confidence interval. Incidence rate was not calculated as there were no hypertension cases during follow-up (—).