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Table 1 Demographics and general characteristics of the different groups

From: The relationship between sleep and wake habits and academic performance in medical students: a cross-sectional study

Variables Total
(n = 410)
“Excellent”
115 (28%)
“Average”
295 (72%)
P value
Sex (Male) 273 (67) 73 (63) 200 (68) 0.405
BMI 25.01 ± 8.56 24.46 ± 11.05 25.24 ± 7.33 0.423
Obese (BMI > 30) 57 (13.9) 9 (7.8) 48 (16.3) 0.026
Smoke (Yes) 24 (5.9) 1 (0.9) 23 (7.9) 0.007
Internet Usage >2 hr 197 (48) 43 (37) 153 (52) 0.028
Job (volunteer or employee) during school days 74 (18.0) 23 (20.2) 51 (17.3) 0.506
  1. BMI: Body mass index.