Comparison of the Effect of Different Local Analgesia Administration Techniques in Total Hip Arthroplasty: A Retrospective Comparative Cohort Study

Table 3

MCID for the NRS scores of the three groups.

	POD 1	POD 7
Control group (N = 113)
MCID (points)	0.7 ± 2.8 (0.2–1.2)	3.2 ± 2.3 (2.8–3.7)
Improvement of >1.65 points, n (%)	40 (35.4)	89 (78.8)
PAI group (N = 87)
MCID (points)	2.5 ± 2.7 (1.9–3.1)	4.5 ± 2.4 (4.0–5.0)
Improvement of >1.65 points, n (%)	62 (71.3)	77 (88.5)
IAI group (n = 81)
MCID (points)	2.6 ± 3.3 (1.9–3.4)	4.9 ± 2.4 (4.4–5.4)
Improvement of >1.65 points, n (%)	50 (61.7)	74 (91.4)

Numerical data are expressed as mean ± standard deviation (95% confidence interval). MCID, minimal clinically important difference; NRS, numeric rating scale; POD, postoperative; PAI, periarticular injection; IAI, intra-articular injection.