Table 1 Baseline characteristics of the participants by sex
| Characteristics | Women | Men | ||||
|---|---|---|---|---|---|---|
|
Green tea daily (n = 298) |
Green tea never (n = 5343) | P-value |
Green tea daily (n = 624) |
Green tea never (n = 3012) | P-value | |
| Age, mean (SD), y | 84.0 (12.0) | 87.7 (12.1) | < 0.001 | 80.9 (10.6) | 84.8 (11.1) | < 0.001 |
| Urban residence, n (%) | 116 (38.9) | 2107 (39.4) | 0.861 | 279 (44.7) | 812 (27.0) | < 0.001 |
| Area, n (%) | ||||||
| Northern China | 48 (16.1) | 1587 (29.7) | < 0.001 | 149 (23.9) | 893 (29.6) | 0.004 |
| Southern China | 250 (83.9) | 3756 (70.3) | 475 (76.1) | 2119 (70.4) | ||
| Married, n (%) | 114 (38.3) | 1447 (27.1) | < 0.001 | 432 (69.2) | 1633 (54.2) | < 0.001 |
| Physical labor regularly, n (%) | 197 (66.1) | 3910 (73.2) | 0.008 | 404 (64.7) | 2265 (75.2) | < 0.001 |
| Having pension, n (%) | 103 (34.6) | 842 (15.8) | < 0.001 | 288 (46.2) | 787 (50.7) | 0.040 |
| Smoking status, n (%) | ||||||
| Never smoker | 270 (90.6) | 4969 (93.0) | 0.205 | 187 (30.0) | 1526 (50.7) | < 0.001 |
| Former smoker | 13 (4.4) | 201 (3.8) | 198 (31.7) | 770 (25.6) | ||
| Current smoker | 15 (5.0) | 173 (3.2) | 239 (38.3) | 716 (23.8) | ||
| Current drinking, n (%) | 32 (10.7) | 264 (4.9) | < 0.001 | 209 (33.5) | 629 (20.9) | < 0.001 |
| Sleeping time, mean (SD), h | 7.2 (2.4) | 7.4 (2.5) | 0.170 | 7.5 (2.0) | 7.7 (2.3) | 0.076 |
| Anxiety score, n (%) | ||||||
| 0–4 | 263 (88.3) | 4657 (87.2) | 0.582 | 579 (92.8) | 2730 (90.6) | 0.087 |
| ≥ 5 | 35 (11.7) | 686 (12.8) | 45 (7.2) | 282 (9.4) | ||
| History of comorbidities, n (%) | ||||||
| Hypertension | 141 (47.3) | 2343 (43.9) | 0.241 | 322 (51.6) | 1197 (39.7) | < 0.001 |
| Diabetes | 44 (14.8) | 497 (9.3) | 0.002 | 88 (14.1) | 249 (8.3) | < 0.001 |
| Dyslipidemia | 34 (11.4) | 244 (4.6) | < 0.001 | 49 (7.9) | 122 (4.1) | < 0.001 |
| Heart diseases | 75 (25.2) | 938 (17.6) | 0.001 | 116 (18.6) | 456 (15.1) | 0.031 |
| Stroke or CVD | 40 (13.4) | 530 (9.9) | 0.051 | 78 (12.5) | 394 (13.1) | 0.694 |
| Eating fresh vegetables daily, n (%) | 200 (67.1) | 3357 (62.8) | 0.136 | 459 (73.6) | 1882 (62.5) | < 0.001 |
| Eating salt-preserved vegetables daily, n (%) | 47 (15.8) | 722 (13.5) | 0.269 | 76 (12.2) | 329 (10.9) | 0.364 |
| Eating fresh fruits daily, n (%) | 74 (24.8) | 1157 (21.7) | 0.196 | 168 (26.9) | 614 (20.4) | < 0.001 |