Satisfactory clinical and radiologic outcomes with a new shorter and modular stem for end-stage hip osteoarthritis: an international prospective multicentre pilot study

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Table 3

Subgroup analysis by gender; difference between time point was performed with Bonferroni adjusted p-value.

Time Point	Mean value and comparison within time period
	Male	Female
	Unadjusted mean ± SD (n)	Unadjusted mean ± SD (n)	p-value
UCLA
Preop	4.2 ± 1.7 (116)	3.5 ± 1.4 (106)	0.0013*
6 Month	5.8 ± 1.4^a (97)	5.2 ± 1.4^a (98)	0.0033*
1 Year	6.0 ± 1.6^a (91)	5.8 ± 1.6^a (87)	0.4767
2 Year	6.2 ± 1.8^a (73)	5.9 ± 1.4^a,b (72)	0.1968
3 Year	6.3 ± 1.8^a,b (76)	6.1 ± 1.4^a,b (67)	0.2608
5 Year	6.9 ± 1.5^a (34)	6.1 ± 1.3^a (42)	0.0142*
EQ5D
Preop	0.5 ± 0.2 (116)	0.4 ± 0.3 (106)	0.0015*
6 Month	0.9 ± 0.1^a (96)	0.8 ± 0.2^a,b (97)	0.0104*
1 Year	0.9 ± 0.1^a (89)	0.9 ± 0.2^a (87)	0.1083
2 Year	0.9 ± 0.2^a (73)	0.9 ± 0.2^a (71)	0.1205
3 Year	0.9 ± 0.2^a (76)	0.9 ± 0.2^a (67)	0.2762
5 Year	1.0 ± 0.1^a,b (34)	0.9 ± 0.1^a,b (39)	0.0423*
HHS
Preop	52.3 ± 11.7 (116)	46.4 ± 13.4 (106)	0.0010*
6 Month	96.2 ± 6.3^a (98)	91.3 ± 10.4^a (96)	0.0006*
1 Year	98.1 ± 3.3^a,b (91)	94.4 ± 8.5^a,b (89)	0.0010*
2 Year	97.1 ± 6.7^a,b (73)	95.6 ± 7.5^a,b (71)	0.0155
3 Year	96.6 ± 8.3^a (76)	97.3 ± 5.5^a,b (66)	0.4177
5 Year	97.7 ± 4.3^a,b (34)	96.9 ± 5.0^a,b (39)	0.3573
Oxford
Preop	24.0 ± 7.5 (116)	20.0 ± 7.2 (106)	0.0002*
6 Month	44.7 ± 4.2^a (97)	42.0 ± 6.1^a (98)	0.0006*
1 Year	45.7 ± 3.5^a (91)	43.9 ± 5.8^a,b (87)	0.0420*
2 Year	45.8 ± 4.2^a,b (73)	44.8 ± 4.3^a,b (72)	0.0060*
3 Year	45.6 ± 4.9^a,b (76)	46.1 ± 2.8^a,b,b (66)	0.8770
5 Year	46.7 ± 2.8^a,b (34)	46.2 ± 2.5^a,b (42)	0.1224
Aluminum (μg/L)
Preop	11.8 ± 1.4 (22)	12.8 ± 2.5 (9)	0.2861
6 Month	12.4 ± 1.7 (13)	12.0 ± 1.9 (12)	0.3986
1 Year	14.6 ± 3.9 (17)	13.3 ± 3.1 (7)	0.3730
2 Year	14.3 ± 4.2 (14)	12.6 ± 2.3 (7)	0.2960
5 Year	13.0 ± 2.7 (4)	15.6 ± 1.5 (3)	0.1573
Titanium (μg/L)
Preop	2.5 ± 0.7 (4)	1.9 ± 0.7 (5)	0.2207
6 Month	2.9 ± 2.2 (22)	1.8 ± 0.7 (21)	0.0800
1 Year	2.9 ± 2.2 (21)	1.9 ± 0.6 (14)	0.4082
2 Year	3.2 ± 2.9 (18)	2.3 ± 0.9 (9)	0.5707
5 Year	1.4 ± 0.3 (3)	1.2 ± 0.2 (2)	0.2482

Scores and laboratory findings are presented as mean ± SD (n).

Significant difference (p < 0.05) by time; – = not evaluated.

Statistical significant difference versus Preop value.

Statistical significant difference versus 6-month value.

^c=b

Statistical significant difference versus 1-year value.

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