Table 2 Sleep characteristics of medical students in the university of Danang by clinical training status.

From: Sleep quality by clinical training status among medical students and its associated factors: a cross-sectional study in Da Nang, Vietnam

Characteristics

Total

n = 577

Preclinical

n = 295

Clinical

n = 282

p-value

n (%)

Lunch napping

- None

67 (11.6)

42 (14.2)

25 (8.9)

0.121a

− 1–20 min/day

34 (5.9)

18 (6.1)

16 (5.7)

- > 20 min/day

476 (82.5)

235 (79.7)

241 (85.4)

Sleep affected by light (yes)

226 (39.2)

119 (40.3)

107 (37.9)

0.556a

Sleep affected by noise (yes)

323 (56.0)

166 (56.3)

157 (55.7)

0.885a

Sleep latency (minute)

15 (5–30)

15 (5–30)

15 (5–30)

0.894c

Sleep duration (hour)

6.0 (6.0–7.0)

7.0 (6.0–7.0)

6.0 (5.0–6.5)

< 0.001 c

Total PSQI score (median, IQR)

5 (4–7)

5 (4–6)

6 (4–7)

0.023 c

Total PSQI score (mean ± SD)

5.4 ± 2.3

5.2 ± 2.1

5.6 ± 2.4

0.014 d

Sleep quality

- Poor (PSQI > 5)

264 (45.8)

118 (40.0)

146 (51.8)

0.005 a

- Good (PSQI ≤ 5)

313 (54.2)

177 (60.0)

136 (48.2)

Subjective sleep quality

- Very good

97 (16.8)

50 (16.9)

47 (16.7)

0.046 b

- Fairly good

407 (70.5)

216 (73.2)

191 (67.7)

- Fairly bad

68 (11.8)

29 (9.9)

39 (13.8)

- Very bad

5 (0.9)

0 (0.0)

5 (1.8)

Sleep latency (minute)

- ≤ 15

377 (65.3)

195 (66.1)

182 (64.5)

0.489b

− 16–30

169 (29.3)

82 (27.8)

87 (30.9)

− 31–60‎

30 (5.2)

18 (6.1)

12 (4.2)

- > 60

1 (0.2)

0 (0.0)

1 (0.4)

Sleep duration (hour)

- > 7

69 (12.0)

47 (15.9)

22 (7.8)

< 0.001 a

− 6–7

364 (63.1)

199 (67.5)

165 (58.5)

− 5–6

113 (19.6)

38 (12.9)

75 (26.6)

- < 5

31 (5.3)

11 (3.7)

20 (7.1)

Habitual sleep efficiency (%)

- > 85%

464 (80.4)

236 (80.0)

228 (80.9)

0.812b

− 75–85%

88 (15.3)

44 (14.9)

44 (15.6)

− 65–74%

21 (3.6)

13 (4.4)

8 (2.8)

- < 65%

4 (0.7)

2 (0.7)

2 (0.7)

Sleep disturbances

- None

115 (19.9)

56 (19.0)

59 (20.9)

0.038 b

- Mild

419 (72.6)

209 (70.8)

210 (74.5)

- Moderate

43 (7.5)

30 (10.2)

13 (4.6)

- Severe

0 (0.0)

0 (0.0)

0 (0.0)

Sleeping medication

- None

564 (97.7)

289 (97.9)

275 (97.5)

0.905b

- Less than once a week

9 (1.6)

4 (1.4)

5 (1.8)

- Once or twice a week

4 (0.7)

2 (0.7)

2 (0.7)

- Three or more times a week

0 (0.0)

0 (0.0)

0 (0.0)

Daytime dysfunction

- None

126 (21.8)

64 (21.7)

62 (22.0)

0.014 a

- Mild

276 (47.8)

158 (53.6)

118 (41.8)

- Moderate

147 (25.5)

60 (20.3)

87 (30.9)

- Severe

28 (4.9)

13 (4.4)

15 (5.3)

  1. Categorial variables are presented as number (percentage); Continuous variables are presented as median (Interquartile range). Statistical comparison using aChi-square test, bFisher’s exact test, cMann-Whitney U test and dT-test. The bold p-value indicated statistical significance (p < 0.05).
  2. PSQI: Pittsburgh Sleep Quality Index.
Back to article page