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. 2021 Feb 17;21:111. doi: 10.1186/s12909-021-02544-8

Table 3.

Odds ratios (and 95% confidence intervals) for the association between sleep deprivation groups and high quality of life, mental symptoms, and DREEM scores

Crude Adjusted

Q1

≤ 2 h

Q2-Q3

3 and 4 h

Q4

>  4 h

Q1

≤ 2 h

Q2-Q3

3 and 4 h

Q4

>  4 h

WHOQOL
 Physical Ref (1.0) 0.61 (0.48–0.77) 0.36 (0.26–0.49) Ref (1.0) 0.61 (0.48–0.78) 0.36 (0.26–0.49)
 Psychological Ref (1.0) 0.63 (0.49–0.80) 0.41 (0.30–0.55) Ref (1.0) 0.62 (0.49–0.80)

0.41 (0.30–0.55)

0.56 (0.41–0.77)

 Social Relationships Ref (1.0) 0.70 (0.55–0.89) 0.58 (0.42–0.78) Ref (1.0) 0.68 (0.54–0.87)
 Environment Ref (1.0) 0.88 (0.69–1.11) 0.45 (0.33–0.62) Ref (1.0) 0.84 (0.66–1.07) 0.44 (0.32–0.60)
VERAS-Q
 Time use Ref (1.0) 0.69 (0.54–0.87) 0.37 (0.27–0.50) Ref (1.0) 0.68 (0.54–0.87) 0.36 (0.27–0.50)
 Psychological Ref (1.0) 0.58 (0.46–0.74) 0.44 (0.32–0.60) Ref (1.0) 0.58 (0.45–0.74) 0.44 (0.32–0.60)
 Physical Ref (1.0) 0.71 (0.56–0.90) 0.38 (0.28–0.52) Ref (1.0) 0.69 (0.54–0.88) 0.37 (0.27–0.51)
 Environment Ref (1.0) 0.85 (0.67–1.07) 0.65 (0.48–0.88) Ref (1.0) 0.81 (0.63–1.03) 0.62 (0.46–0.85)
Quality of life
 Overall Ref (1.0) 0.97 (0.75–1.25) 0.76 (0.55–1.04) Ref (1.0) 0.94 (0.73–1.21) 0.74 (0.54–1.01)
 Medical school-related Ref (1.0) 0.73 (0.58–0.93) 0.45 (0.33–0.62) Ref (1.0) 0.71 (0.56–0.91) 0.44 (0.32–0.60)
Mental symptoms
 BDI Ref (1.0) 1.47 (1.16–1.86) 2.99 (2.16–4.14) Ref (1.0) 1.46 (1.15–1.86) 3.01 (2.16–4.19)
 Anxiety-state Ref (1.0) 1.07 (0.85–1.36) 1.95 (1.42–2.67) Ref (1.0) 1.07 (0.84–1.36) 1.94 (1.42–2.67)
 Anxiety-trait Ref (1.0) 1.56 (1.23–1.98) 2.62 (1.90–3.60) Ref (1.0) 1.55 (1.22–1.98) 2.63 (1.90–3.64)
DREEM
 Perceptions of learning Ref (1.0) 0.81 (0.64–1.02) 0.63 (0.46–0.86) Ref (1.0) 0.79 (0.62–0.9998) 0.62 (0.45–0.84)
 Perception of teachers Ref (1.0) 1.07 (0.84–1.36) 0.71 (0.53–0.97) Ref (1.0) 1.04 (0.81–1.32) 0.70 (0.51–0.96)
 Perceptions of atmosphere Ref (1.0) 0.80 (0.63–1.02) 0.46 (0.34–0.63) Ref (1.0) 0.80 (0.63–1.02) 0.46 (0.34–0.63)
 Academic self-perceptions Ref (1.0) 0.92 (0.73–1.17) 0.53 (0.39–0.73) Ref (1.0) 0.91 (0.72–1.16) 0.53 (0.39–0.72)
 Social self-perceptions Ref (1.0) 0.72 (0.57–0.91) 0.46 (0.33–0.62) Ref (1.0) 0.71 (0.56–0.90) 0.45 (0.33–0.62)
 Global Ref (1.0) 0.90 (0.71–1.14) 0.44 (0.32–0.61) Ref (1.0) 0.89 (0.70–1.13) 0.44 (0.32–0.60)

High scores are defined as those equal of above the median for the whole sample. P-values below 0.05 are in bold. Adjusted models are adjusted for age, sex and year of medical school