Table 1.
Basic characteristics and clinical parameters of the study population
| Overall (n = 659) |
With hypertension (n = 213) |
Without hypertension (n = 446) |
P Value | |
|---|---|---|---|---|
| Age, years | 49.85 ± 11.17 | 51.00 ± 11.77 | 49.30 ± 10.84 | 0.075 |
| Sex | < 0.001 | |||
| Male | 116 (17.60) | 52 (24.41) | 64 (14.35) | |
| Female | 543 (82.40) | 161 (75.59) | 382 (85.65) | |
| Education | 0.001 | |||
| Without formal education | 83 (12.59) | 41 (19.25) | 42 (9.42) | |
| Primary school | 278 (42.19) | 93 (43.66) | 185 (41.48) | |
| Junior high school | 253 (38.39) | 67 (31.46) | 186 (41.70) | |
| Senior high school and above | 40 (6.07) | 12 (5.63) | 28 (6.28) | |
| Average monthly household income per capita (yuan) | 0.948 | |||
| ≤ 1000 | 126 (19.12) | 40 (18.78) | 86 (19.28) | |
| 1001–3000 | 387 (58.73) | 127 (59.62) | 260 (58.30) | |
| ≥ 3000 | 146 (22.15) | 46 (21.60) | 100 (22.42) | |
| BMI (kg/m2) | < 0.01 | |||
| < 18.5 | 19 (2.88) | 3 (1.41) | 16 (3.59) | |
| 18.5–24.5 | 386 (58.57) | 101 (47.42) | 285 (63.90) | |
| 24.5–28 | 197 (29.89) | 81 (38.03) | 116 (26.01) | |
| ≥ 28 | 57 (8.65) | 28 (13.15) | 29 (6.50) | |
| Smok | 0.015 | |||
| Yes | 102 (15.48) | 44 (20.66) | 58 (13.00) | |
| No | 557 (84.52) | 169 (79.34) | 388 (87.00) | |
| Drink | 0.211 | |||
| Yes | 111 (16.84) | 42 (19.72) | 69 (15.47) | |
| No | 548 (83.16) | 171 (80.28) | 377 (84.53) | |
| Occupation | < 0.001 | |||
| Worker | 382 (57.97) | 105 (49.30) | 277 (62.11) | |
| Farmer | 228 (34.60) | 97 (45.54) | 131 (29.37) | |
| Other | 49 (7.44) | 11 (5.16) | 38 (8.52) | |
| SOD (U/mL) | 127.28 (118.76,134.05) | 65.41 (50.76,93.53) | 100.31 (62.69,93.53) | < 0.001 |
| MDA (nmol/mL) | 4.03 (2.70,6.72) | 4.65 (4.40,5.11) | 4.50 (4.15,4.73) | < 0.001 |
| GSH (mg/L) | 1.19 (0.64,2.35) | 1.31 (1.24,1.45) | 1.48 (1.30,1.82) | < 0.001 |
BMI body mass index, GSH Glutathione, SOD Superoxide dismutase, MDA Malondialdehyde. Normally and non-normally distributed variables were presented as mean ± SD and median (IQR), respectively. For categorical variables, values were presented as number (percentage). Continuous variables were compared with Student's t-test or Mann–Whitney U test, and the category variables were compared with Chi-square tests