Table 1.
Baseline characteristics of the longitudinal study population by PP-MM
| Characteristic | Overall (n = 10,707) | Non-PP-MM (n = 10,528) | PP-MM (n = 179) | P value |
|---|---|---|---|---|
| Age_group (%) | 56.4 (8.64) | 59.3 (9.24) | 58.2 (9.18) | 0.032 |
| Under 65 | 8213 (76.7) | 8061 (76.6) | 152 (84.9) | |
| 65 and over | 2494 (23.3) | 2467 (23.4) | 27 (15.1) | |
| Gender (%) | ||||
| Men | 4947 (46.2) | 4896 (46.5) | 51 (28.5) | < 0.001 |
| Women | 5760 (53.8) | 5632 (53.5) | 128 (71.5) | |
| Hukou (%) | ||||
| Agricultual Hukou | 8771 (81.9) | 8606 (81.7) | 165 (92.2) | 0.002 |
| Other | 1936 (18.1) | 1922 (18.3) | 14 (7.8) | |
| Marriage (%) | ||||
| Married and living with spouse | 9166 (85.6) | 9019 (85.7) | 147 (82.1) | 0.408 |
| Other | 1541 (14.4) | 1509 (14.3) | 32 (17.9) | |
| Education (%) | ||||
| Primary school below | 4863 (45.4) | 1923 ( 35.9) | 562 ( 65.8) | < 0.001 |
| Primary school | 2390 (22.3) | 1223 ( 22.9) | 154 ( 18.0) | |
| Middle school or above | 3454 (32.3) | 2205 ( 41.2) | 138 ( 16.2) | |
| Smoking (%) | ||||
| Smoker | 4081 (38.1) | 4031 (38.3) | 50 (27.9) | 0.018 |
| Non-smoker | 6626 (61.9) | 6497 (61.7) | 129 (72.1) | |
| Drinking (%) | ||||
| Drinker | 3522 (32.9) | 7049 (67.0) | 136 (76.0) | < 0.001 |
| Non-drinker | 7185 (67.1) | 3479 (33.0) | 43 (24.0) | |
| Sleep_group (Mean (SD)) | 6.42 (1.85) | 6.43 (1.85) | 5.83 (2.05) | < 0.001 |
| BMI_group (%) | ||||
| Under 25 | 7294 (68.1) | 7177 (68.2) | 117 (65.4) | 0.935 |
| 25–30.0 | 2851 (26.6) | 2798 (26.6) | 53 (29.6) | |
| 30.0 and over | 562 ( 5.2) | 553 (5.3) | 9 (5.0) | |
| Hypertension (%) | ||||
| Yes | 3635 (33.9) | 6961 (66.1) | 111 (62.0) | 0.516 |
| No | 7072 (66.1) | 3567 (33.9) | 68 (38.0) | |