Table 2.
Incidence rates of hypertension by baseline variables.
| Variables | At risk (number) | Cases (number) | Person-year | Incidence per 1000 person-year | Crude Odds ratio (95% CI) |
Age- and gender-adjusted odds ratio (95% CI)† |
|---|---|---|---|---|---|---|
| Gender | ||||||
| Female | 610 | 80 | 9948 | 8.0 | 1.00 | 1.00 |
| Male | 557 | 101 | 8922 | 11.3 | 1.47(1.07,2.02)∗ | 1.48(1.07,2.05)∗ |
| Age at registration (yr.) | ||||||
| ≤10 | 160 | 14 | 2865 | 4.9 | 1.00 | - |
| 11–20 | 496 | 69 | 8150 | 8.5 | 1.69 (0.92,3.08) | - |
| 21–30 | 342 | 57 | 4951 | 11.5 | 2.09 (1.13,3.87)∗ | - |
| >30 | 163 | 39 | 2928 | 13.3 | 3.28 (1.70, 6.73)∗∗∗ | - |
| Age at diagnosis (yr.) | ||||||
| ≤10 | 280 | 35 | 4969 | 7.0 | 1.00 | 1.00 |
| 11–20 | 534 | 72 | 8468 | 8.5 | 1.09 (0.71,1.68) | 0.84 (0.53,1.36) |
| 21–30 | 250 | 48 | 3722 | 12.9 | 1.66(1.04,2.67)∗ | 0.95 (0.50,1.80) |
| >30 | 84 | 21 | 1527 | 13.8 | 2.33(1.27,4.29)∗∗ | 0.84 (0.30,2.36) |
| Duration of diabetes (yr.) | ||||||
| ≤1 | 659 | 90 | 10198 | 8.8 | 1.00 | 1.00 |
| 2-3 | 179 | 29 | 2991 | 9.7 | 1.22 (0.78,1.93) | 1.13 (0.71,1.80) |
| 4-5 | 90 | 14 | 1654 | 8.5 | 1.16 (0.63,2.15) | 0.94 (0.50,1.79) |
| 6–10 | 119 | 22 | 2114 | 10.4 | 1.43 (0.86,2.40) | 1.23 (0.72,2.10) |
| >10 | 110 | 23 | 1787 | 12.9 | 1.87(1.09,3.19)∗ | 1.13 (0.64,2.01) |
| Fasting blood glucose (mg/dl) | ||||||
| <100 | 201 | 33 | 3294 | 10.0 | 1.00 | 1.00 |
| 100–126 | 141 | 22 | 2185 | 10.1 | 0.94 (0.52,1.70) | 0.92 (0.51,1.66) |
| ≥126 | 813 | 126 | 13267 | 9.5 | 0.93 (0.61,1.42) | 0.89 (0.58,1.36) |
| HbA1 (%) | ||||||
| <7.0 | 204 | 27 | 2430 | 11.1 | 1.00 | 1.00 |
| 7.0–9.5 | 283 | 47 | 4065 | 11.6 | 1.30 (0.78,2.19) | 1.30 (0.77,2.18) |
| ≥9.5 | 312 | 63 | 4665 | 13.5 | 1.66(1.02,2.71)∗ | 1.72(1.04,2.82)∗ |
| BMI (Kg/m2) | ||||||
| <25 | 941 | 136 | 15509 | 8.8 | 1.00 | 1.00 |
| 25–30 | 135 | 32 | 2077 | 14.4 | 1.84(1.19,2.85)∗∗ | 1.54 (0.96,2.45) |
| >30 | 52 | 8 | 650 | 12.3 | 1.08 (0.50,2.34) | 0.92 (0.40,2.17) |
| Creatinine (μM/l) | ||||||
| ≤1.2 | 914 | 156 | 14291 | 10.9 | 1.00 | 1.00 |
| >1.2 | 47 | 11 | 800 | 13.8 | 1.49 (0.74,2.98) | 1.12 (0.54,2.30) |
| Cholesterol (mg/dl) | ||||||
| <200 | 732 | 106 | 11297 | 9.4 | 1.00 | 1.00 |
| ≥200 | 355 | 73 | 6442 | 11.3 | 1.53(1.10,2.13)∗ | 1.37 (0.98,1.93) |
| Triglyceride (mg/dl) | ||||||
| <150 | 806 | 118 | 13048 | 9.0 | 1.00 | 1.00 |
| ≥150 | 275 | 61 | 4581 | 13.3 | 1.66(1.18,2.35)∗∗ | 1.45(1.01,2.08)∗ |
Total number of person-years and at risk is not the same for each variable because of missing values. ∗P < 0.5, ∗∗P < 0.01, ∗∗∗P<0.001. †Odds ratios (with 95% CI) calculated by multiple logistic regression.