Table 1

Descriptive statistics for Tokyo Early Adolescence Survey variables broken down by tobacco use

Non-smokersLight smokersModerate to heavy smokersP values
N (%)3739 (92.0)204 (5.0)120 (3.0)
Purpose in life, mean (SD)57.3 (9.7)54.8 (9.8)52.6 (9.9)<0.001
Age, mean (SD)42.0 (4.1)41.2 (5.0)40.5 (4.8)<0.001
Education, n (%)
 Junior high school or lower22 (0.6)12 (5.9)9 (7.5)<0.001
 High school512 (13.7)66 (32.4)48 (40.0)
 Technical or junior college1626 (43.5)89 (43.6)51 (42.5)
 4-year university or higher1579 (42.2)37 (18.1)12 (10.0)
Marital status, n (%)
 Yes3613 (96.6)182 (89.2)97 (80.8)<0.001
 No126 (3.4)22 (10.8)23 (19.2)
Family annual income, n (%)
 Less than 4 million yen285 (7.6)42 (20.6)31 (25.8)<0.001
 4–6 million yen1022 (27.3)74 (36.3)57 (47.5)
 7–9 million yen1162 (31.1)55 (27.0)21 (17.5)
 More than 10 million yen1270 (34.0)33 (16.2)11 (9.2)
Alcohol use, n (%)
 Non1160 (31.0)44 (21.6)43 (35.8)<0.001
 Less than once a month563 (15.1)35 (17.2)9 (7.5)
 2–4 times a month689 (18.4)24 (11.8)15 (12.5)
 2–3 times a week594 (15.9)21 (10.3)16 (13.3)
 More than four times a week733 (19.6)80 (39.2)37 (30.8)
K6 (psychological distress), mean (SD)2.9 (3.3)3.4 (3.4)3.5 (3.9)0.026