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| Impaired sleep quality | Odds ratio | 95% Confidence interval | p value |
| Sex | |||
| Male | 1 | 0.313 | |
| Female | 1.32 | 0.77-2.30 | |
| Residence | |||
| Private house | 1 | 0.048 | |
| Dormitory | 1.73 | 1.01-2.99 | |
| Body mass index | |||
| Normal | 1 | ||
| Overweight | 3.09 | 1.58-6.06 | <0.001 |
| Obese | 3.65 | 0.79-16.88 | 0.097 |
| Grade | |||
| Basic sciences course | 1 | ||
| Physiopathology course | 1.05 | 0.51-2.19 | 0.889 |
| Stagership | 1.38 | 0.65-2.90 | 0.399 |
| Internship | 1.90 | 0.85-4.26 | 0.119 |
