Table 1 Participant characteristics, by year

Age

22.0 ± 2.5

650^a

22.0 ± 2.5

620^a

21.9 ± 2.6

389^a

Sex (women)

n, (%)

288 (44.8%)

643^a

285 (43.9%)

650^a

167 (42.5%)

393^a

Student grade

643^a

650^a

398^a

 First year

n, (%)

115 (17.9%)

122 (18.8%)

104 (26.1%)

 Second year

n, (%)

114 (17.7%)

115 (17.7%)

74 (18.6%)

 Third year

n, (%)

99 (15.4%)

112 (17.2%)

69 (17.3%)

 Fourth year

n, (%)

94 (14.6%)

99 (15.2%)

60 (15.1%)

 Fifth year

n, (%)

107 (16.6%)

100 (15.3%)

46 (11.6%)

 Sixth year

n, (%)

114 (17.7%)

102 (15.7%)

45 (11.3%)

Living alone

n, (%)

438 (67.5%)

649^a

436 (67.7%)

644^a

189 (48.1%)

393^a

Takes part in extracurricular activity

n, (%)

446 (67.2%)

664^a

433 (66.8%)

648^a

251 (64.0%)

392^a

Has a part time job

n, (%)

171 (25.8%)

664^a

178 (27.5%)

648^a

105 (26.4%)

398^a

Current smoker

n, (%)

19 (2.9%)

663^a

21 (3.3%)

646^a

11 (2.8%)

393^a

Current drinker

n, (%)

421 (63.4%)

664^a

418 (35.3%)

646^a

242 (61.4%)

394^a