[Retracted] Preoperative Predictors of Prolonged Hospital Stay in Accelerated Rehabilitation for Patients Undergoing Orthopedic Surgery

Table 8

Cross-over (chi-square) analysis.

Subject	Name	Injury etiology													Amount to	χ^2
		Playing table tennis	Playing volleyball	Playing basketball	Playing badminton	Fall	None	Ski	Taekwondo	Run	Dance aerobics	Playing football	Traffic accident	Heavy impact
Injured site	Artificial grassland	0	0	0	0	0	0	0	0	0	0	11	0	0	11	488.238	≤0.001^∗∗
	Plastic floor	1	1	10	4	1	0	0	0	0	0	0	0	0	17
	Without	0	0	0	0	0	2	0	0	0	0	0	0	0	2
	Floorboard	0	0	4	1	0	0	0	0	0	0	0	0	0	5
	Wooden floor	0	0	1	0	0	0	0	0	0	1	0	0	0	2
	Unknown	0	0	0	0	0	1	0	0	0	0	0	0	0	1
	Asphalt pavement	0	0	0	0	2	0	0	0	0	0	0	1	0	3
	Cement floor	0	3	21	3	24	0	0	0	2	0	0	2	1	56
	Foam pad	0	0	0	0	0	0	0	1	0	0	0	0	0	1
	Lawn	0	0	0	0	0	0	0	0	0	0	1	0	0	1
	Snow field	0	0	0	0	0	0	1	0	0	0	0	0	0	1
Number of cases		1	4	36	8	27	3	1	1	2	1	12	3	1	100

.