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Table 1 Characteristics of university students in the autumn and spring cohorts of the Healthy Campus Trial

From: Dynamics of depressive states among university students in Japan during the COVID-19 pandemic: an interrupted time series analysis

Characteristics

Total n = 1626

Autumn n = 522

Spring n = 1104

χ2 (p-value)

Age, mean (range), years

21.5 (18–39)

21.4 (18–35)

21.6 (18–39)

 

Sex, n (%)

 Male

693 (42.6)

217 (41.6)

476 (43.1)

0.29 (0.59)

 Female

933 (57.4)

305 (58.4)

628 (56.9)

Academic level, n (%)

 Undergraduate

1,250 (76.9)

416 (79.7)

834 (75.5)

4.53 (0.10)

 Master

291 (17.9)

86 (16.5)

205 (18.6)

 Doctorate

85 (5.2)

20 (3.8)

65 (5.9)

Living status, n (%)

 Living with family

624 (38.4)

204 (39.1)

420 (38.0)

2.66 (0.45)

 Living alone

902 (55.5)

284 (54.4)

618 (56.0)

 Living in a dormitory

70 (4.3)

27 (5.2)

43 (3.9)

 Others

30 (1.8)

7 (1.3)

23 (2.1)

Part-time employment, n (%)

 None

365 (22.4)

110 (21.1)

255 (23.1)

2.30 (0.68)

 A few times/year

148 (9.1)

54 (10.3)

94 (8.5)

 One to three times/month

330 (20.3)

102 (19.5)

228 (20.7)

 Two to three times/week

656 (40.3)

214 (41.0)

442 (40.0)

 More than four times/week

127 (7.8)

42 (8.0)

85 (7.7)

Breakfast, n (%)

 Rarely

171 (10.5)

45 (8.6)

126 (11.4)

5.32 (0.07)

 Sometimes

581 (35.7)

177 (33.9)

404 (36.6)

 Daily

874 (53.8)

300 (57.5)

574 (52.0)

Exercise, n (%)

 Rarely

612 (37.6)

202 (38.7)

410 (37.1)

1.42 (0.49)

 Sometimes

824 (50.7)

266 (51.0)

558 (50.5)

 Daily

190 (11.7)

54 (10.3)

136 (12.3)

Drinking, n (%)

 None

961 (59.1)

323 (61.9)

638 (57.8)

6.28 (0.04)

 Less than two units/day

640 (39.4)

196 (37.5)

444 (40.2)

 Two or more units/day

25 (1.5)

3 (0.6)

22 (2.0)

Smoking, n (%)

 None

1532 (94.2)

492 (94.3)

1,040 (94.2)

0.48 (0.92)

 10 cigarettes/day

47 (2.9)

15 (2.9)

32 (2.9)

 20 cigarettes/day

46 (2.8)

15 (2.9)

31 (2.8)

 30 or more cigarettes/day

1 (0.1)

0

1 0.1)

Mental illness treatment, n (%)

 None

1442 (88.7)

456 (87.4)

986 (89.3)

4.04 (0.13)

 Follow-up

13 (0.8)

2 (0.4)

11 (1.0)

 Past history

171 (10.5)

64 (12.3)

107 (9.7)