Table 2.
Descriptive characteristic for participants by residential greenness in the Chinese Elderly Health Service Cohorta.
| Population characteristics | Total | Low greenness | High greenness |
|---|---|---|---|
| Participants, n | 3,159 | 1,579 | 1,580 |
| Age, years, mean (SD) | 84.3 (6.6) | 84.4 (6.6) | 84.3 (6.5) |
| Sex, n (%) | |||
| Male | 1,658 (52.5) | 846 (53.6) | 812 (51.4) |
| Female | 1,501 (47.5) | 733 (46.4) | 768 (48.6) |
| Marital status, n (%) | |||
| Married | 753 (23.8) | 371 (23.5) | 382 (24.2) |
| Unmarried | 2,406 (76.2) | 1,208 (76.5) | 1,198 (75.8) |
| BMI quartile, n (%) | |||
| Underweight [<19.0 kg/m2] | 684 (21.7) | 349 (22.1) | 335 (21.2) |
| Normal [19.0–25.0 kg/m2] | 1,663 (52.6) | 846 (53.6) | 817 (51.7) |
| Overweight [25.0–30.0 kg/m2] | 719 (22.8) | 336 (21.3) | 383 (24.2) |
| Obese [≥30.0 kg/m2] | 93 (2.9) | 48 (3.0) | 45 (2.8) |
| Exercise | |||
| Days per week, mean (SD) | 5.4 (2.8) | 5.4 (2.8) | 5.4 (2.8) |
| Education, n (%) | |||
| Uneducated | 1,392 (44.1) | 623 (39.5) | 769 (48.7) |
| Primary | 1,238 (39.2) | 628 (39.8) | 610 (38.6) |
| Secondary | 426 (13.5) | 255 (16.1) | 171 (10.8) |
| Post-secondary | 103 (3.3) | 73 (4.6) | 30 (1.9) |
| Alcohol consumption, n (%) | |||
| Never drink | 2,088 (66.1) | 1,064 (67.4) | 1,024 (64.8) |
| Former drink | 566 (17.9) | 256 (16.2) | 310 (19.6) |
| Social/seasonal drinker | 370 (11.7) | 193 (12.2) | 177 (11.2) |
| Regular drinker | 135 (4.3) | 66 (4.2) | 69 (4.4) |
| Smoking status, n (%) | |||
| Never | 2,022 (64.0) | 1,033 (65.4) | 989 (62.6) |
| Quit | 889 (28.1) | 432 (27.4) | 457 (28.9) |
| Current | 248 (7.9) | 114 (7.2) | 134 (8.5) |
Abbreviations: BMI=body mass index; SD=standard deviation.
a
Low and high greenness were defined by the median (0.065) of normalized difference vegetation index within 250m.