Comparison of demographic, stress and lifestyle factors by medical school class.

Table 3b: Comparison of demographic, stress and lifestyle factors by medical school class.

		Medical school class
Variable^a	No. responses	MS1	MS2	MS3	MS4	P-value^b
Demographic
Age	135	25.05 ± 3.28	26.27 ± 3.17	26.96 ± 2.48	27.07 ± 2.06	0.02
BMI	126	22.51 ± 3.01	21.91 ± 2.25	24.20 ± 2.65	24.15 ± 3.33	0.005^c
Stress
PSS-10	135	21.37 ± 3.74	21.61 ± 4.49	21.52 ± 2.74	22.14 ± 3.84	0.93
Breakdown of PSS
Felt upset	135	1.49 ± 0.89	1.61 ± 0.95	1.74 ± 0.92	1.36 ± 1.01	0.58
Felt unable to control	135	1.32 ± 0.95	1.63 ± 1.04	1.65 ± 1.07	1.36 ± 1.45	0.39
Felt stressed	135	2.47 ± 1.00	2.49 ± 1.03	2.61 ± 0.078	2.07 ± 1.38	0.47
Felt confident	135	3.25 ± 0.89	2.98 ± 0.80	3.04 ± 0.82	2.86 ± 1.17	0.33
Felt things were going your way	135	3.07 ± 0.73	2.37 ± 0.86	2.57 ± 0.99	3.29 ± 0.83	< 0.001^d
Felt unable to cope	135	1.53 ± 1.40	1.88 ± 1.10	1.88 ± 1.10	2.00 ± 1.47	0.37
Felt able to control	135	135	2.66 ± 0.76	2.74 ± 1.01	3.36 ± 0.74	0.10
Felt on top of things	135	2.88 ± 0.89	2.50 ± 0.96	2.52 ± 0.85	3.21 ± 0.80	0.03
Felt angered	135	1.49 ± 0.87	1.85 ± 1.04	1.87 ± 1.01	1.36 ± 0.84	0.11
Felt could not overcome	135	1.04 ± 0.91	1.04 ± 0.91	1.26 ± 1.01	1.29 ± 1.27	0.01^e
Lifestyle activities
Exercise	132	4.53 ± 3.14	3.56 ± 2.16	4.13 ± 2.90	4.04 ± 1.74	0.39
Sleep	132	48.00 ± 6.37	49.37 ± 9.17	46.04 ± 8.16	49.07 ± 7.40	0.41
Study	131	30.41 ± 13.98	24.90 ± 17.39	21.32 ± 18.69	5.21 ± 6.51	< 0.00^f
Sit	130	51.45 ± 19.49	49.05 ± 20.54	36.09 ± 25.95	25.93 ± 11.38	< 0.00^g
Walk	129	8.39 ± 6.79	7.12 ± 7.95	15.05 ± 10.52	9.21 ± 6.02	0.002^h

^aBMI: Body Mass Index; PSS-10: Perceived Stress Scale-10; ^bP-value comparing medical school classes by ANOVA; ^cMS2 and MS3 (p = 0.01); ^dMS4 and MS2 (p = 0.003), MS2 and MS1 (p < 0.001); ^eMS2 and MS1 (p = 0.006); ^fMS4 and MS1 (p < 0.001), MS4 and MS2 (p = 0.001), MS4 and MS3 (p = 0.02); ^gMS4 and MS1 (p < 0.001), MS4 and MS2 (p = 0.002); hMS3 and MS1 (p = 0.006), MS3 and MS2 (p = 0.001).