Table I.

Comparison of preoperative general data among the four groups of patients.

		Sex			Craig fracture classification		Cause of injury
Group	No.	Male	Female	Age (years)	Class II type II	Class II type V	Traffic injury	Fall injury	Time from injury to operation (days)
Group A	18	11	7	55.2±16.3	15	3	8	10	3.4±2.9
Group B	26	16	10	51.7±17.1	22	4	13	13	3.2±3.1
Group C	20	14	6	51.9±20.3	16	4	14	6	3.4±2.7
Group D	20	13	7	47.8±15.1	17	3	12	8	3.4±3.2
χ2/F value	–	0.328		0.129	3.216		2.168		4.286
P-value	–	0.628		0.746	0.168		0.348		0.251