Table 1 Baseline characteristics of adolescents from the KYRBS, 2006–2022.
Variables | Total | Before pandemic | During pandemic | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
2006–2008 | 2009–2011 | 2012–2014 | 2015–2017 | 2018–2019 | 2020 | 2021 | 2022 | |||
Overall, n (%) | 1,138,804 (100.00) | 221,340 (19.44) | 223,947 (19.67) | 218,681 (19.20) | 195,847 (17.20) | 117,343 (10.30) | 54,948 (4.83) | 54,848 (4.82) | 51,850 (4.56) | |
Age, mean (SD) | 15.01 (1.75) | 15.00 (1.74) | 15.07 (1.74) | 14.91 (1.75) | 14.98 (1.74) | 14.99 (1.77) | 15.10 (1.75) | 15.09 (1.74) | 15.10 (1.73) | |
Sex, n (%) | Male | 587,256 (51.57) | 115,948 (52.38) | 115,876 (51.74) | 111,346 (50.92) | 100,631 (51.38) | 60,304 (51.39) | 28,353 (51.60) | 28,401 (51.78) | 26,397 (50.91) |
Female | 551,548 (48.43) | 105,392 (47.62) | 108,071 (48.26) | 107,335 (49.08) | 95,216 (48.62) | 57,039 (48.61) | 26,595 (48.40) | 26,447 (48.22) | 25,453 (49.09) | |
Grade level, n (%) | Middle school (7–9th ) | 583,626 (51.25) | 115,183 (52.04) | 114,453 (51.11) | 109,983 (50.29) | 97,403 (49.73) | 59,613 (50.80) | 28,961 (52.71) | 30,015 (54.72) | 28,015 (54.03) |
High school (10–12th ) | 555,178 (48.75) | 106,157 (47.96) | 109,494 (48.89) | 108,698 (49.71) | 98,444 (50.27) | 57,730 (49.20) | 25,987 (47.29) | 24,833 (45.28) | 23,835 (45.97) | |
Residential area, n (%) | Rural | 413,743 (36.33) | 89,425 (40.40) | 86,232 (38.51) | 74,446 (34.04) | 67,326 (34.38) | 40,196 (34.26) | 19,091 (34.74) | 19,040 (34.71) | 17,987 (34.69) |
Urban | 725,061 (63.67) | 131,915 (59.60) | 137,715 (61.49) | 144,235 (65.96) | 128,521 (65.62) | 77,147 (65.74) | 35,857 (65.26) | 35,808 (65.29) | 33,863 (65.31) | |
Recent alcohol consumption, n (%) | No | 927,046 (81.41) | 161,104 (72.79) | 176,814 (78.95) | 180,780 (82.67) | 165,800 (84.66) | 99,276 (84.60) | 49,056 (89.28) | 49,045 (89.42) | 45,171 (87.12) |
Yes | 211,758 (18.59) | 60,236 (27.21) | 47,133 (21.05) | 37,901 (17.33) | 30,047 (15.34) | 18,067 (15.40) | 5,892 (10.72) | 5,803 (10.58) | 6,679 (12.88) | |
Smoking status, n (%) | No | 1,032,955 (90.71) | 192,639 (87.03) | 195,480 (87.29) | 194,975 (89.16) | 181,815 (92.84) | 111,209 (94.77) | 53,727 (97.78) | 53,194 (96.98) | 49,916 (96.27) |
Yes | 105,849 (9.29) | 28,701 (12.97) | 28,467 (12.71) | 23,706 (10.84) | 14,032 (7.16) | 6,134 (5.23) | 1,221 (2.22) | 1,654 (3.02) | 1,934 (3.73) | |
Parental educational attainment, n (%) | High school diploma or less | 577,814 (48.35) | 132,914 (56.45) | 119,797 (50.44) | 105,737 (46.57) | 83,309 (40.82) | 56,773 (47.16) | 27,947 (49.45) | 27,518 (48.84) | 23,819 (44.41) |
Bachelor’s degree or higher | 560,990 (51.65) | 88,426 (43.55) | 104,150 (49.56) | 112,944 (53.43) | 112,538 (59.18) | 60,570 (52.84) | 27,001 (50.55) | 27,330 (51.16) | 28,031 (55.59) | |
Academic achievement, n (%) | Low | 418,440 (37.00) | 81,147 (37.05) | 78,512 (35.25) | 77,240 (35.37) | 75,453 (38.28) | 45,363 (38.42) | 20,146 (36.86) | 20,528 (37.14) | 20,051 (38.80) |
Middle | 319,483 (28.59) | 59,952 (26.86) | 60,245 (26.94) | 60,164 (27.61) | 55,388 (28.41) | 34,760 (29.74) | 16,585 (30.13) | 16,903 (31.01) | 15,486 (30.02) | |
High | 400,881 (34.41) | 80,241 (36.09) | 85,190 (37.81) | 81,277 (37.02) | 65,006 (33.31) | 37,220 (31.84) | 18,217 (33.01) | 17,417 (31.85) | 16,313 (31.18) | |
