Table 2.
Basic characteristics of participants aged 18~59 years in CNHS 2015–2017.
| Characteristics | Habitual Tea Consumption (n, %) | |||
|---|---|---|---|---|
| None | 1~2 Cups/Day | 3~4 Cups/Day | Over 5 Cups/Day | |
| Gender * | ||||
| Male | 11,366 (36.9%) | 2495 (53.89%) | 2142 (62.38%) | 3436 (70.25%) |
| Female | 19,436 (63.1%) | 2135 (46.11%) | 1292 (37.62%) | 1455 (29.75%) |
| Age (year) * | ||||
| 18~<30 | 4328 (14.05%) | 569 (12.29%) | 294 (8.56%) | 319 (6.52%) |
| 30~<45 | 9561 (31.04%) | 1608 (34.73%) | 1105 (32.18%) | 1437 (29.38%) |
| 45~59 | 16,913 (54.91%) | 2453 (52.98%) | 2035 (59.26%) | 3135 (64.1%) |
| BMI * | ||||
| Underweight | 1116 (3.62%) | 148 (3.2%) | 96 (2.8%) | 187 (3.82%) |
| Normal | 14,585 (47.35%) | 2130 (46%) | 1539 (44.82%) | 2207 (45.12%) |
| Overweight | 10,803 (35.07%) | 1610 (34.77%) | 1216 (35.41%) | 1722 (35.21%) |
| Obese | 4298 (13.95%) | 742 (16.03%) | 583 (16.98%) | 775 (15.85%) |
| Living area * | ||||
| Urban | 12,163 (39.49%) | 1968 (42.51%) | 1443 (42.02%) | 2016 (41.22%) |
| Rural | 18,639 (60.51%) | 2662 (57.49%) | 1991 (57.98%) | 2875 (58.78%) |
| Education level * | ||||
| Primary school or below | 12,063 (39.16%) | 1620 (34.99%) | 1240 (36.11%) | 1817 (37.15%) |
| Junior middle school | 11,219 (36.42%) | 1597 (34.49%) | 1246 (36.28%) | 1728 (35.33%) |
| High school or higher | 7520 (24.41%) | 1413 (30.52%) | 948 (27.61%) | 1346 (27.52%) |
| Income * | ||||
| Not given | 4660 (15.13%) | 664 (14.34%) | 423 (12.32%) | 578 (11.82%) |
| Low | 7420 (24.09%) | 1114 (24.06%) | 842 (24.52%) | 1181 (24.15%) |
| Medium | 11,740 (38.11%) | 1655 (35.75%) | 1317 (38.35%) | 1820 (37.21%) |
| High | 6982 (22.67%) | 1197 (25.85%) | 852 (24.81%) | 1312 (26.82%) |
| Marital status * | ||||
| Married | 28,487 (92.48%) | 4275 (92.33%) | 3227 (93.97%) | 4631 (94.68%) |
| Other status | 2315 (7.52%) | 355 (7.67%) | 207 (6.03%) | 260 (5.32%) |
| Current smoker * | ||||
| No | 24,503 (79.55%) | 3193 (68.96%) | 2081 (60.6%) | 2599 (53.14%) |
| Yes | 6299 (20.45%) | 1437 (31.04%) | 1353 (39.4%) | 2292 (46.86%) |
| Excessive drinking * | ||||
| No | 28,519 (92.59%) | 4102 (88.6%) | 2929 (85.29%) | 3881 (79.35%) |
| Yes | 2283 (7.41%) | 528 (11.4%) | 505 (14.71%) | 1010 (20.65%) |
| Physical activity | ||||
| Low | 7139 (23.18%) | 1080 (23.33%) | 802 (23.35%) | 1157 (23.66%) |
| Medium | 7601 (24.68%) | 1125 (24.3%) | 823 (23.97%) | 1194 (24.41%) |
| High | 16,062 (52.15%) | 2425 (52.38%) | 1809 (52.68%) | 2540 (51.93%) |
| Sedentary behavior (h) * | ||||
| <2 | 3952 (12.83%) | 503 (10.86%) | 388 (11.3%) | 514 (10.51%) |
| 2~3 | 11,717 (38.04%) | 1730 (37.37%) | 1301 (37.89%) | 1837 (37.56%) |
| ≥4 | 15,133 (49.13%) | 2397 (51.77%) | 1745 (50.82%) | 2540 (51.93%) |
| Sleep duration (h) * | ||||
| <7 | 5351 (17.37%) | 771 (16.65%) | 559 (16.28%) | 852 (17.42%) |
| 7~8 | 18,984 (61.63%) | 2958 (63.89%) | 2242 (65.29%) | 2960 (60.52%) |
| ≥9 | 6467 (21%) | 901 (19.46%) | 633 (18.43%) | 1079 (22.06%) |
| DASH-diet * | ||||
| Q1 | 8181 (26.56%) | 1203 (25.98%) | 974 (28.36%) | 1544 (31.57%) |
| Q2 | 8229 (26.72%) | 1172 (25.31%) | 910 (26.5%) | 1098 (22.45%) |
| Q3 | 7586 (24.63%) | 1151 (24.86%) | 770 (22.42%) | 1057 (21.61%) |
| Q4 | 6806 (22.1%) | 1104 (23.84%) | 780 (22.71%) | 1192 (24.37%) |
| Medical examination * | ||||
| No | 24,893 (80.82%) | 3638 (78.57%) | 2714 (79.03%) | 3693 (75.51%) |
| Yes | 5909 (19.18%) | 992 (21.43%) | 720 (20.97%) | 1198 (24.49%) |
| Family history of hypertension * | ||||
| No | 20,098 (65.25%) | 2895 (62.53%) | 2176 (63.37%) | 2980 (60.93%) |
| Yes | 10,704 (34.75%) | 1735 (37.47%) | 1258 (36.63%) | 1911 (39.07%) |
| Family history of diabetes * | ||||
| No | 27,321 (88.7%) | 4049 (87.45%) | 3011 (87.68%) | 4228 (86.44%) |
| Yes | 3481 (11.3%) | 581 (12.55%) | 423 (12.32%) | 663 (13.56%) |
| MetS | ||||
| No | 21,366 (69.37%) | 3207 (69.27%) | 2356 (68.61%) | 3434 (70.21%) |
| Yes | 9436 (30.63%) | 1423 (30.73%) | 1078 (31.39%) | 1457 (29.79%) |
* Indicated p < 0.001; values of polytomous variables may not sum to 100% due to rounding.