Table 1 Characteristics of males by time intervals (n = 1,627,557)
1977–1980 (n = 97,483) | 1981–1985 (n = 1,35,678) | 1986–1990 (n = 1,57,008) | 1991–1995 (n = 2,05,252) | 1996–2000 (n = 2,07,875) | 2001–2005 (n = 2,05,692) | 2006–2010 (n = 1,93,699) | 2011–2015 (n = 2,18,790) | 2016–2020 (n = 2,06,080) | Total (n = 16,27,557) | P for trend | |
|---|---|---|---|---|---|---|---|---|---|---|---|
Age (mean ± SD) | 17.4 ± 0.5 | 17.4 ± 0.5 | 17.4 ± 0.5 | 17.5 ± 0.8 | 17.5 ± 0.8 | 17.3 ± 0.6 | 17.3 ± 0.6 | 17.4 ± 0.8 | 17.4 ± 0.7 | 17.4 ± 0.7 | 0.12 |
Height (cm ± SD) | 172.9 ± 6.6 | 173.3 ± 6.7 | 173.9 ± 6.7 | 174.3 ± 6.8 | 174.2 ± 6.9 | 173.9 ± 6.8 | 174.2 ± 6.7 | 173.8 ± 6.8 | 174.2 ± 6.8 | 174 ± 6.8 | 0.046 |
BMI (mean ± SD) | 20.7 ± 2.8 | 20.6 ± 2.9 | 21.1 ± 3.1 | 21.1 ± 3.3 | 21.1 ± 3.5 | 21.6 ± 3.8 | 21.9 ± 4.0 | 22.4 ± 4.35 | 22.8 ± 4.4 | 21.5 ± 3.7 | < 0.001 |
CDC BMI groups (% of each BMI percentile category) | < 0.001 | ||||||||||
Underweight | 8058 (8.3) | 12,513 (9.3) | 13,828 (8.9) | 17,000 (8.6) | 18,334 (9.1) | 15,578 (7.7) | 13,081 (6.8) | 13,472 (6.3) | 13,556 (6.7) | 1,24,420 (7.8) | |
Normal weight | 81,228 (84.2) | 1,11,594 (82.9) | 1,25,690 (80.7) | 1,57,596 (79.5) | 1,57,312 (77.8) | 1,53,480 (75.9) | 1,41,329 (73.8) | 1,52,355 (70.9) | 1,42,770 (70.7) | 12,23,354 (76.6) | |
Overweight | 5326 (5.4) | 7429 (5.5) | 11,223 (7.2) | 15,606 (7.9) | 16,508 (8.2) | 19,816 (9.8) | 21,381 (11.2) | 27,084 (12.6) | 24,796 (12.3) | 1,49,079 (9.3) | |
Obese | 1986 (2.1) | 3050 (2.3) | 5030 (3.2) | 7950 (4.0) | 10,052 (5.0) | 13,375 (6.6) | 15,893 (8.2) | 22,114 (10.3) | 20,776 (10.3) | 1,00,026 (6.3) | |
Immigrants (% of time interval) | 18,842 (19.3) | 15,576 (11.5) | 13,872 (8.8) | 37,962 (18.5) | 47,970 (23.1) | 46,705 (22.7) | 34,773 (18.0) | 24,944 (11.4) | 19,012 (9.2) | 2,59,656 (16.0) | 0.97 |
Years of education ≥ 11 (% of time interval) | 61,361 (63.2) | 99,202 (73.4) | 12,968 (82.8) | 1,85,590 (90.6) | 1,91,457 (92.1) | 1,93,326 (94.0) | 1,81,861 (94.0) | 2,00,850 (92.1) | 1,73,019 (94.5) | 1,416,346 (88.4) | 0.004 |
Socioeconomic status (% of each category) | 0.37 | ||||||||||
Low | 29,456 (30.7) | 41,462 (30.9) | 45,283 (29.1) | 58,851 (29.0) | 58,187 (28.1) | 58,214 (28.4) | 57,367 (29.7) | 71,381 (32.8) | 58,985 (28.9) | 4,79,195 (29.7) | |
Medium | 45,714 (47.6) | 64,026 (47.7) | 76,167 (49.0) | 1,02,573 (50.5) | 1,09,380 (52.9) | 1,06,996 (52.2) | 98,301 (51.0) | 1,04,099 (47.9) | 1,01,908 (50.0) | 8,09,164 (50.1) | |
High | 20,807 (21.7) | 28,628 (21.3) | 34,051 (21.9) | 41,798 (20.6) | 39,138 (18.9) | 39,689 (19.4) | 37,255 (19.3) | 41,987 (19.3) | 43,061 (21.1) | 3,26,414 (20.2) | |