. 2018 Aug 15;18:198. doi: 10.1186/s12909-018-1297-9

Table 4.

Comparison of the two groups regarding the mean scores of attitude and empathy in three time points

Variables	Group	Before the intervention	Immediately after the intervention	Two months later	F (p-value)	Effect size	Power
Variables	Group	Mean (± SD)	Mean (± SD)	Mean (± SD)	F (p-value)	Effect size	Power
Attitude	Intervention	110.8 (±10.9)	155.2 (±23.4)	158.6 (±23.2)	76.4 (< 0. 001)^a	0.71	0.100
	Control	110 (±12.3)	126.6 (±13)	128.4 (±13.3)	33.6 (< 0.001)^a	0.53	0.100
	P-value	0.78^b	< 0.001 ^c	< 0.001 ^c
	Power	0.50	0.100	0.100
Empathy	Intervention	77.8 (±10.7)	86 (±7.3)	85.2 (±8.9)	17.3 (< 0.001)^a	0.36	0.99
	Control	78.6 (±10.1)	76.7 (±11.9)	77.5 (±11.3)	1.1 (0.32)^a	0.03	0.19
	P-value	0.77^b	< 0.001 ^c	0.004 ^b
	Power	0.30	0.97	0.86

^aRepeated measures analysis of variance

^bIndependent t-test

^cMann-Whitney test

The bold numbers are significant p-values