Table 1 Basic characteristics of participants in the study from 1991 to 2011
From: Trans fatty acid intake among Chinese population: a longitudinal study from 1991 to 2011
1991 | 1993 | 1997 | 2000 | 2004 | 2006 | 2009 | 2011 | |
|---|---|---|---|---|---|---|---|---|
Number of participants (%) | ||||||||
Women | 6247 (51.9) | 5837 (51.6) | 6124 (50.4) | 6030 (51.0) | 5894 (51.3) | 5697 (51.4) | 5830 (51.0) | 5623 (52.1) |
Men | 5790 (48.1) | 5470 (48.4) | 6041 (49.6) | 5799 (49.0) | 5600 (48.7) | 5378 (48.6) | 5594 (49.0) | 7092 (47.8) |
Total | 12,037 | 11,307 | 12,168 | 11,829 | 11,494 | 11,075 | 11,424 | 10,790 |
Age group (years)(%) | ||||||||
Mean ± SD | 31.4 (0.2) | 32.6 (0.2) | 35.5 (0.2) | 37.8 (0.2) | 41.9 (0.2) | 43.7 (0.2) | 44.7 (0.2) | 46.1 (0.2) |
≤ 18 | 3912 (32.5) | 3509 (31.0) | 3165 (26.0) | 2732 (23.1) | 2043 (17.8) | 1718 (15.5) | 1620 (14.2) | 1487 (13.8) |
19–60 | 6920 (57.5) | 6580 (58.2) | 7421 (61.0) | 7377 (62.4) | 7361 (64.0) | 7084 (64.0) | 7223 (63.2) | 6548 (60.7) |
≥ 61 | 1205 (10.0) | 1218 (10.8) | 1582 (13.0) | 1720 (14.5) | 2090 (18.2) | 2273 (20.5) | 2581 (22.6) | 2755 (25.5) |
BMI (kg/m2) (%)a | ||||||||
Mean ± SD | 20.2 (0.1) | 20.4 (0.1) | 21.0 (0.1) | 21.6 (0.1) | 22.2 (0.1) | 22.4 (0.1) | 22.5 (0.1) | 23.2 (0.1) |
< 18.5 | 3654 (31.3) | 3224 (29.3) | 2666 (24.7) | 2374 (20.6) | 1772 (16.6) | 1543 (15.1) | 1636 (15.3) | 2031 (14.1) |
[18.5,24) | 6457 (55.3) | 6148 (55.9) | 5916 (54.9) | 6139 (53.3) | 5649 (52.8) | 5366 (52.5) | 5330 (49.8) | 6741 (46.6) |
[24,28) | 1308 (11.2) | 1388 (12.6) | 1767 (16.4) | 2371 (20.6) | 2540 (23.7) | 2562 (25.1) | 2841 (26.6) | 4090 (28.4) |
≥ 28 | 260 (2.2) | 246 (2.2) | 424 (3.9) | 639 (5.5) | 734 (6.9) | 748 (7.3) | 892 (8.3) | 1560 (10.8) |