Table 3. Analysis of the factors predisposing to revision surgery.

*Statistically significant (p<0.05)

Variable	Level		Revision		χ²	P-value
			No	Yes
Gender	Male	Observed	31	14	3.04	0.081
		Expected	34.58	10.42
	Female	Observed	42	8
		Expected	38.42	11.58
Periprosthetic infection	No	Observed	73	20	6.78	0.009*
		Expected	71.46	21.54
	Yes	Observed	0	2
		Expected	1.54	0.46
Periprosthetic fracture	No	Observed	73	20	6.78	0.009*
		Expected	71.46	21.54
	Yes	Observed	0	2
		Expected	1.54	0.46
Cemented	No	Observed	49	6	11.01	<0.001*
		Expected	42.26	12.74
	Yes	Observed	24	16
		Expected	30.74	9.26
Osteolysis	No	Observed	69	9	33.07	<0.001*
		Expected	59.94	18.06
	Yes	Observed	4	13
		Expected	13.06	3.94
Component lessening	No	Observed	69	4	55.36	<0.001*
		Expected	56.09	16.91
	Yes	Observed	4	18
		Expected	16.91	5.09
Small particle disease	No	Observed	72	18	9.58	<0.001*
		Expected	69.16	20.84
	Yes	Observed	1	4
		Expected	3.84	1.16
Dislocation	No	Observed	73	21	3.35	0.067
		Expected	72.23	21.77
	Yes	Observed	0	1
		Expected	0.77	0.23
Thromboembolic events	No	Observed	73	21	3.35	0.067
		Expected	72.23	21.77
	Yes	Observed	0	1
		Expected	0.77	0.23