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

Table 6

Cross-over (chi-square) analysis.

Subject	Name	History of smoking and drinking				Amount to	χ^2
		Drink	Smoke	Smoking and drinking	Without
Injury etiology	Playing basketball	0.00%	0.00%	0.00%	3.66%	2.88%	45.854	≤0.001^∗∗
	Fall	0.00%	11.11%	0.00%	12.20%	10.58%
	Crush injury	50.00%	0.00%	9.09%	0.00%	1.92%
	No obvious injury history	50.00%	55.56%	27.27%	40.24%	40.38%
	Sprain of knee	0.00%	22.22%	63.64%	42.68%	42.31%
	Run	0.00%	11.11%	0.00%	0.00%	0.96%
	Hurt by riding a bike	0.00%	0.00%	0.00%	1.22%	0.96%
Number of cases		2	9	11	82	104

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