Table 1 Descriptive statistics of the study participants at baseline by quintiles of the PHDI adherence score
|  | Overall N = 3404 | Quintile 1 N = 681 | Quintile 2 N = 681 | Quintile 3 N = 681 | Quintile 4 N = 681 | Quintile 5 N = 680 | P |
|---|---|---|---|---|---|---|---|
PHDI | 73.6 (7.5) | 66.2 (5.5) | 70.5 (0.1) | 71.2 (0.3) | 74.7 (1.9) | 85.6 (5.9) | 0.000 |
Age | 65.2 (5.8) | 64.9 (5.8) | 65.6 (5.8) | 65.4 (5.9) | 65.0 (5.7) | 65.0 (5.9) | 0.057 |
Energy intake, kcal/d | 2080.9 (635.7) | 2046.7 (649.5) | 2121.6 (645.6) | 2022.2 (611.0) | 2079.1 (611.9) | 2135.1 (653.8) | 0.004 |
BMI | 23.1 (3.6) | 23.2 (3.7) | 22.7 (3.6) | 23.0 (3.6) | 23.5 (3.6) | 23.4 (3.6) | <0.001 |
Male (%) | 1597 (46.9%) | 322 (47.3%) | 329 (48.3%) | 291 (42.7%) | 338 (49.6%) | 317 (46.6%) | 0.116 |
Married (%) | 2679 (78.7%) | 547 (80.3%) | 520 (76.4%) | 532 (78.1%) | 542 (79.6%) | 538 (79.1%) | 0.430 |
Education | Â | Â | Â | Â | Â | Â | <0.001 |
 Primary | 2529 (74.3%) | 504 (74.0%) | 530 (77.8%) | 538 (79.0%) | 472 (69.3%) | 485 (71.3%) |  |
 Middle | 444 (13.0%) | 97 (14.2%) | 87 (12.8%) | 70 (10.3%) | 96 (14.1%) | 94 (13.8%) |  |
 High | 431 (12.7%) | 80 (11.7%) | 64 (9.4%) | 73 (10.7%) | 113 (16.6%) | 101 (14.9%) |  |
Urban (%) | 1274 (37.4%) | 234 (34.4%) | 214 (31.4%) | 269 (39.5%) | 293 (43.0%) | 264 (38.8%) | <0.001 |
Region (%) | Â | Â | Â | Â | Â | Â | <0.001 |
 Northern | 587 (17.2%) | 143 (21.0%) | 88 (12.9%) | 83 (12.2%) | 139 (20.4%) | 134 (19.7%) |  |
 Eastern | 850 (25.0%) | 161 (23.6%) | 145 (21.3%) | 183 (26.9%) | 198 (29.1%) | 163 (24.0%) |  |
 Central | 1065 (31.3%) | 194 (28.5%) | 246 (36.1%) | 217 (31.9%) | 188 (27.6%) | 220 (32.4%) |  |
 Southern | 902 (26.5%) | 183 (26.9%) | 202 (29.7%) | 198 (29.1%) | 156 (22.9%) | 163 (24.0%) |  |
Household income per capita, Yuan | 5753.3 (7828.3) | 6107.1 (8521.4) | 4540.1 (6019.5) | 4694.7 (6081.2) | 6626.7 (7021.2) | 6799.2 (7202.5) | <0.001 |
Smoking (%) | 1085 (31.9%) | 237 (34.8%) | 228 (33.5%) | 206 (30.2%) | 220 (32.3%) | 194 (28.5%) | 0.096 |
Current drinkers (%) | 1025 (30.1%) | 220 (32.3%) | 177 (26.0%) | 214 (31.4%) | 211 (31.0%) | 203 (29.9%) | 0.096 |
Hypertension (%) | 635 (18.7%) | 136 (20.0%) | 101 (14.8%) | 124 (18.2%) | 131 (19.2%) | 143 (21.0%) | 0.039 |
Diabetes (%) | 130 (3.8%) | 24 (3.5%) | 24 (3.5%) | 25 (3.7%) | 30 (4.4%) | 27 (4.0%) | 0.903 |
Physical activity (%) | Â | Â | Â | Â | Â | Â | 0.264 |
 Light | 1818 (58.8%) | 337 (55.8%) | 360 (61.0%) | 391 (61.8%) | 361 (56.5%) | 369 (58.9%) |  |
 Moderate | 677 (21.9%) | 134 (22.2%) | 118 (20.0%) | 133 (21.0%) | 146 (22.8%) | 146 (23.3%) |  |
 Vigorous | 598 (19.3%) | 133 (22.0%) | 112 (19.0%) | 109 (17.2%) | 132 (20.7%) | 112 (17.9%) |  |