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

Table 5

Comparison of laboratory data on POD 1 among the three groups.

Laboratory data	POD 1
	Control group	PAI group	IAI group	value	95% confidence interval
	(N = 113)	(N = 87)	(N = 81)
WBC (/μL)	8072.6 ± 1654.2	11470.1 ± 2409.0	11025.9 ± 2220.9	C versus P: <0.0001	2600.0–4100.0
				C versus I: <0.0001	2200.0–3700.0
				P versus I: 0.4925	−1300.0–500.0
AST (U/L)	26.5 ± 11.9	22.0 ± 7.6	22.6 ± 8.7	C versus P: <0.0001	−6.0–2.0
				C versus I: 0.0008	−5.0–1.0
				P versus I: 0.4869	−1.0–3.0
ALT (U/L)	17.1 ± 8.5	16.7 ± 11.8	17.3 ± 14.5	C versus P: 0.1556	−3.0–0
				C versus I: 0.4459	−3.0–1.0
				P versus I: 0.7745	−1.0–2.0
CK (U/L)	457.8 ± 289.2	301.1 ± 136.7	329.5 ± 138.3	C versus P: <0.0001	−172.0–65.0
				C versus I: 0.0002	−146.0–39.0
				P versus I: 0.3262	−18.0–73.0
BUN (mg/dL)	10.0 ± 3.6	12.0 ± 3.5	13.3 ± 5.0	C versus P: <0.0001	1.0–2.9
				C versus I: <0.0001	1.7–3.9
				P versus I: 0.2429	−0.4–2.0
Cr (mg/dL)	0.59 ± 0.17	0.55 ± 0.12	0.57 ± 0.15	C versus P: 0.1745	−0.07–0.01
				C versus I: 0.3808	−0.06–0.02
				P versus I: 0.8890	−0.03–0.05
CRP (mg/dL)	5.0 ± 2.1	3.0 ± 1.5	2.6 ± 1.8	C versus P: <0.0001	−2.5–1.3
				C versus I: <0.0001	−3.0–1.74
				P versus I: 0.0921	−1.04–0.06
D-dimer (μg/mL)	3.5 ± 7.2	3.4 ± 2.6	3.9 ± 3.3	C versus P: 0.8024	−0.6–0.36
				C versus I: 0.9685	−3.0–1.74
				P versus I: 0.7607	−1.04–0.06

Values are expressed as mean ± standard deviation. PAI and P, periarticular injection; IAI and I, intra-articular injection; C, control; POD, postoperative day; WBC, white blood cell count; AST, aspartate transaminase; ALT, alanine aminotransferase; CK, creatine phosphokinase; BUN, blood urea nitrogen; Cr, creatinine; CRP, C-reactive protein.