Table 1. Baseline characteristics of the community hypertensive patients by category of body-mass index.
| Characteristics | Body mass index (kg/m2) | P | |||||||
| <18 | 18–20 | 20–22 | 22–24 | 24–26 | 26–28 | 28–30 | ≥30 | ||
| N | 194 | 672 | 1560 | 2442 | 2103 | 1313 | 570 | 332 | |
| Death (n, %) | 39 (20.1) | 63 (9.4) | 119 (7.6) | 143 (5.9) | 98 (4.7) | 56 (4.3) | 30 (5.3) | 13 (3.9) | <0.001 |
| SBP (mmHg) | 133.2±7.7 | 133.3±8.8 | 133.3±9.7 | 133.5±8.2 | 133.9±8.7 | 134.0±9.4 | 134.8±8.2 | 134.7±11.3 | 0.002 |
| DBP (mmHg) | 80.5±5.5 | 81±4.8 | 80.8±5.5 | 81.3±4.7 | 81.6±4.7 | 82.0±5.3 | 82.2±4.8 | 81.9±6.7 | <0.001 |
| Age (y) | 75.6±8.4 | 73.4±8.3 | 71.9±7.7 | 70.6±7.2 | 70.0±7 | 69.5±7 | 69.7±7.1 | 69.4±6.4 | <0.001 |
| Male (n,%) | 91(46.9) | 287(42.7) | 686(44) | 1227(50.2) | 1055(50.2) | 655(49.9) | 240(42.1) | 120(36.1) | <0.001 |
| Smoking (n,%) | 18(9.3) | 55(8.2) | 170(10.9) | 261(10.7) | 240(11.4) | 143(10.9) | 55(9.6) | 24(7.2) | 0.149 |
| Drinking (n,%) | 6(3.1) | 22(3.3) | 54(3.5) | 90(3.7) | 107(5.1) | 51(3.9) | 24(4.2) | 12(3.6) | 0.194 |
| Lack of physical activity (n,%) | 151(77.8) | 524(78) | 1128(72.3) | 1650(67.6) | 1418(67.4) | 904(68.8) | 392(68.8) | 239(72) | <0.001 |
| Diabetes mellitus (n,%) | 15(7.7) | 63(9.4) | 170(10.9) | 291(11.9) | 251(11.9) | 155(11.8) | 79(13.9) | 45(13.6) | 0.123 |
| Serum lipid disorder (n,%) | 6(3.1) | 15(2.2) | 33(2.1) | 65(2.7) | 72(3.4) | 42(3.2) | 22(3.9) | 24(7.2) | <0.001 |
| Cardiovascular disorders (n,%) | 38(19.6) | 88(13.1) | 198(12.7) | 267(10.9) | 240(11.4) | 151(11.5) | 79(13.9) | 37(11.1) | 0.013 |
| Antihypertensive treatment (n,%) | 185(95.4) | 647(96.3) | 1508(96.7) | 2357(96.5) | 2045(97.2) | 1277(97.3) | 555(97.4) | 327(98.5) | 0.295 |
| Antihypertensive number (n) | 1.05±0.31 | 1.07±0.29 | 1.08±0.31 | 1.09±0.34 | 1.09±0.35 | 1.11±0.37 | 1.10±0.36 | 1.14±0.42 | 0.004 |
Data are No. (%) or mean±SD. SBP and DBP indicate systolic and diastolic blood pressures. P values are for the difference among the eight groups. P values less than 0.05 are shown in bold and italics.