Similar outcome with a new anteverted or a straight standard stem: a randomized study of 72 total hip arthroplasties evaluated with clinical variables, radiostereometry, and DXA up to 2 years

Figures & data

Figure 1. Flow chart.

Table 1. Baseline demographics and choice of surgical approach. Values are count unless otherwise specified

Factor	SP-CL	Corail
	n = 37	n = 38
Age, mean (95% CI)	58 (55–61)	62 (60–64)
median (range)	56 (41–73)	62 (45–71)
Sex, male/female	17/20	14/24
Primary OA	35	37
Secondary OA	2	1
BMI, mean (95% CI)	28 (27–29)	26 (25–27)
median (range)	27 (22–36)	26 (21–34)
ASA class
1	16	10
2	20	27
3	1	1
≥ 4	0	0
Charnley class
A	19	14
B	2	6
C	11	11
missing	5	7
Smoking
no	23	23
previously	7	5
yes	1	1
missing	6	9
Surgical approach
posterior	32	19
direct lateral	5	19

Figure 2. Mean OHS (SEM) preoperatively, at 3 and 6 months, 1 and 2 years.

Figure 3. Mean EQ-VAS (SEM) preoperatively, at 3 and 6 months, 1 and 2 years.

Figure 4. Mean medial–lateral (left), proximal–distal (middle), and anterior–posterior migration (right) up to 2 years in 36 SP-CL and 35 Corail stems with RSA data on each follow-up occasion.

Figure 5. Proximal–distal case-by-case migration up to 2 years in individual SP-CL and Corail stems.