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Table 1 Demographic characteristics of the survey participants (n = 62,276)

From: The association between new graphic health warning labels on tobacco products and attitudes toward smoking among south Korean adolescents: a national cross-sectional study

Variable Total (n = 62,276) Boys (n = 31,624) Girls (n = 30,652)
n (%)a n (%)a n (%)a
Grade
 7th grade 10,189 (14.8) 5178 (14.8) 5011 (14.9)
 8th grade 10,377 (15.4) 5272 (15.3) 5105 (15.4)
 9th grade 10,319 (15.1) 5202 (15.1) 5117 (15.0)
 10th grade 10,165 (17.1) 5069 (17.1) 5096 (17.1)
 11th grade 10,800 (19.0) 5610 (19.1) 5190 (18.9)
 12th grade 10,426 (18.6) 5293 (18.6) 5133 (18.7)
Educational stage
 Middle school 30,885 (45.3) 15,652 (45.2) 15,233 (45.3)
 High school 31,391 (54.7) 15,972 (54.8) 15,419 (54.7)
Region
 Metropolitan 32,065 (51.4) 15,848 (51.3) 16,217 (51.5)
 Medium and small cities 26,614 (44.0) 13,940 (44.2) 12,674 (43.9)
 Rural 3597 (4.6) 1836 (4.5) 1761 (4.6)
Family living structure
 Living with both parents 51,735 (83.9) 26,176 (83.5) 25,559 (84.2)
 Living with a single parent 8729 (13.5) 4440 (13.5) 4289 (13.4)
 Others 1812 (2.6) 1008 (3.0) 804 (2.4)
Perceived household economic status
 Wealthy 24,802 (40.4) 13,618 (43.4) 11,184 (37.1)
 Medium 28,582 (45.6) 13,664 (42.9) 14,918 (48.4)
 Poor 8892 (14.0) 4342 (13.7) 4550 (14.5)
Perceived academic record
 High 24,524 (39.2) 12,925 (40.8) 11,599 (37.3)
 Middle 17,810 (28.7) 8683 (27.6) 9127 (30.0)
 Low 19,942 (32.1) 10,016 (31.6) 9926 (32.7)
Perceived stress
 High 23,259 (37.2) 9552 (30.4) 13,707 (44.6)
 Middle 26,271 (42.6) 13,745 (43.9) 12,526 (41.2)
 Low 12,746 (20.2) 8327 (25.8) 4419 (14.2)
Depression experience
 Yes 15,612 (25.1) 6326 (20.3) 9286 (30.3)
 No 46,664 (74.9) 25,298 (79.7) 21,366 (69.7)
Current alcohol use
 User 9597 (16.1) 5562 (18.2) 4035 (13.2)
 Non-user 52,679 (83.9) 26,062 (81.8) 26,617 (86.8)
  1. aWeighted percentages considering the complex sample survey design
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