Table 4b: Comparison of demographic, stress and lifestyle factors between MS0 and MS1-4 Classes.

Medical school class
Variable No. responses MS0 MS1-4 95% CIa P-valueb
Demographic
Age 210 24.65 ± 4.28 25.96 ± 3.10 0.29, 2.31 0.01
BMI 164 23.03 ± 3.15 22.81 ± 2.89 - 1.29, 0.86 0.69
Stress
PSS-10 210 20.29 ± 3.04 21.55 ± 3.82 0.24, 2.27 0.02
Breakdown of PSS
Felt upset 210 1.19 ± 0.82 1.56 ± 0.92 0.12, 0.62 0.004
Felt unable to control 210 1.27 ± 0.98 1.47 ± 1.06 - 0.84, 0.50 0.16
Felt stressed 210 1.84 ± 0.93 2.46 ± 1.02 0.34, 0.90 < 0.001
Felt confident 210 3.20 ± 0.87 3.09 ± 0.89 - 0.36, 0.14 0.39
Felt things were going your way 210 3.15 ± 0.73 2.79 ± 0.89 - 0.59, - 0.12 0.004
Felt unable to cope 210 1.71 ± 1.36 1.68 ± 1.26 - 0.39, 0.34 0.89
Felt able to control 210 2.97 ± 0.85 2.82 ± 0.91 - 0.40, 0.10 0.24
Felt on top of things 210 3.00 ± 0.81 2.74 ± 0.92 - 0.51, - 0.01 0.04
Felt angered 210 1.29 ± 1.01 1.65 ± 0.96 0.08, 0.64 0.01
Felt could not overcome 210 0.68 ± 0.87 1.33 ± 1.11 0.37, 0.92 < 0.001
Lifestyle activities
Exercise 206 5.55 ± 3.95 4.13 ± 2.71 - 2.34, - 0.51 0.003
Sleep 207 48.94 ± 9.48 48.18 ± 7.70 - 3.15, 1.63 0.53
Study 203 11.40 ± 14.61 24.55 ± 16.99 8.46, 17.83 < 0.001
Sit 200 32.94 ± 16.24 45.38 ± 21.94 7.05, 17.84 < 0.001
Walk 200 10.99 ± 6.89 9.23 ± 8.19 - 4.02, 0.50 0.13

a95% confidence interval of the difference of the means between MS0 and MS1- 4 classes; bCalculated by independent samples t-test.