Table 8.

Friedman test results regarding the change in the macrophage activation syndrome left scores of the patients before and after the operation

	n	Mean	SD	Mean rank	χ 2	df	P value
Pre-test	6	16.33	5.13	5.58	29.000	5	0.000
Post-test 1 wk	6	15.67	5.89	5.25
Post-test 1 mo	6	13.17	7.33	4.08
Post-test 2 mo	6	11.33	6.31	2.92
Post-test 4 mo	6	9.17	5.74	2.17
Post-test 12 mo	6	7.00	5.33	1.00

SD: Standard deviation.