Table 3 Characteristics of the participants (n, %)
1991y | 1993y | 1997y | 2000y | 2004y | 2006y | 2009y | 2011y | 2015y | |
|---|---|---|---|---|---|---|---|---|---|
Gender | |||||||||
Male | 2415 (43.6) | 2200 (42.1) | 2093 (42.4) | 2071 (39.6) | 2048 (40.0) | 1969 (39.9) | 2011 (39.9) | 2609 (39.2) | 2777 (37.2) |
Female | 3129 (56.4) | 3021 (57.9) | 2837 (57.6) | 3153 (60.4) | 3069 (60.0) | 2965 (60.1) | 3031 (60.1) | 4041 (60.8) | 4681 (62.8) |
Urban/Rural | |||||||||
Urban | 1832 (33.0) | 1525 (29.2) | 1504 (30.5) | 1651 (31.6) | 1599 (31.2) | 1570 (31.8) | 1583 (31.4) | 3036 (45.6) | 3060 (41.0) |
Rural | 3712 (67.0) | 3696 (70.8) | 3426 (69.5) | 3573 (68.4) | 3518 (68.8) | 3364 (68.2) | 3459 (68.6) | 3614 (54.4) | 4398 (59.0) |
Age (y) | |||||||||
18– | 1831 (33.0) | 1519 (29.1) | 1221 (24.8) | 1054 (20.2) | 755 (14.8) | 563 (11.4) | 640 (12.7) | 784 (11.8) | 693 (9.3) |
30– | 1433 (25.8) | 1346 (25.8) | 1170 (23.7) | 1283 (24.6) | 1128 (22.0) | 1012 (20.5) | 902 (17.9) | 1111 (16.7) | 1215 (16.3) |
40– | 1128 (20.4) | 1193 (22.8) | 1310 (26.6) | 1410 (27.0) | 1336 (26.1) | 1292 (26.2) | 1295 (25.7) | 1743 (26.2) | 1892 (25.4) |
50– | 810 (14.6) | 812 (15.6) | 854 (17.3) | 1087 (20.8) | 1453 (28.4) | 1523 (30.9) | 1578 (31.3) | 2095 (31.5) | 2333 (31.3) |
60–64 | 342 (6.2) | 351 (6.7) | 375 (7.6) | 390 (7.5) | 445 (8.7) | 544 (11.0) | 627 (12.4) | 917 (13.8) | 1325 (17.8) |
Education | |||||||||
≤ elementary school | 2956 (53.6) | 2671 (51.9) | 2315 (48.0) | 2098 (41.3) | 1966 (38.5) | 1821 (37.0) | 1824 (36.2) | 1895 (28.6) | 1977 (26.5) |
middle school | 1603 (29.1) | 1570 (30.5) | 1457 (30.2) | 1654 (32.6) | 1736 (34.0) | 1599 (32.5) | 1771 (35.2) | 2195 (33.1) | 2518 (33.8) |
≥ high school | 955 (17.3) | 903 (17.6) | 1047 (21.7) | 1329 (26.2) | 1406 (27.5) | 1501 (30.5) | 1444 (28.7) | 2546 (38.4) | 2959 (39.7) |
Income | |||||||||
Q1 | 1389 (25.0) | 1311 (25.0) | 1251 (25.4) | 1345 (25.8) | 1310 (25.6) | 1290 (26.2) | 1298 (25.7) | 1732 (26.0) | 1950 (26.2) |
Q2 | 1384 (25.0) | 1303 (25.0) | 1226 (24.9) | 1291 (24.7) | 1269 (24.8) | 1214 (24.6) | 1245 (24.7) | 1639 (24.6) | 1834 (24.6) |
Q3 | 1385 (25.0) | 1303 (25.0) | 1226 (24.9) | 1295 (24.8) | 1269 (24.8) | 1215 (24.6) | 1252 (24.8) | 1640 (24.7) | 1837 (24.6) |
Q4 | 1386 (25.0) | 1304 (25.0) | 1227 (24.9) | 1293 (24.8) | 1269 (24.8) | 1216 (24.6) | 1247 (24.7) | 1639 (24.6) | 1837 (24.6) |
Urbanization index | |||||||||
Q1 | 1365 (24.6) | 1275 (24.4) | 1218 (24.7) | 1292 (24.7) | 1263 (24.7) | 1222 (24.8) | 1247 (24.7) | 1651 (24.8) | 2003 (26.9) |
Q2 | 1394 (25.1) | 1326 (25.4) | 1247 (25.3) | 1315 (25.2) | 1294 (25.3) | 1241 (25.2) | 1263 (25.0) | 1673 (25.2) | 1824 (24.5) |
Q3 | 1362 (24.6) | 1297 (24.8) | 1213 (24.6) | 1305 (25.0) | 1258 (24.6) | 1228 (24.9) | 1240 (24.6) | 1660 (25.0) | 1797 (24.1) |
Q4 | 1423 (25.7) | 1323 (25.3) | 1252 (25.4) | 1312 (25.1) | 1302 (25.4) | 1243 (25.2) | 1292 (25.6) | 1666 (25.0) | 1834 (24.6) |
Chinese Dietary Guidelines | |||||||||
Known | – | – | – | – | 426 (8.5) | 638 (13.0) | 764 (15.2) | 1943 (29.3) | 2189 (29.4) |
Unknown | – | – | – | – | 4605 (91.5) | 4271 (87.0) | 4245 (84.8) | 4691 (70.7) | 5260 (70.6) |
Provinces | |||||||||
Original nine | 5544 (100) | 5221 (100) | 4930 (100) | 5224 (100) | 5117 (100) | 4934 (100) | 5042 (100) | 4566 (68.7) | 4151 (55.7) |
Beijing, Shanghai, Chongqing | – | – | – | – | – | – | – | 2084 (31.3) | 1553 (20.8) |
Shannxi, Zhejiang, Yunnan | – | – | – | – | – | – | – | – | 1754 (23.5) |
Total | 5544 (100) | 5221 (100) | 4930 (100) | 5224 (100) | 5117 (100) | 4934 (100) | 5042 (100) | 6650 (100) | 7458 (100) |