Analgesic effect of single-shot ropivacaine at different layers of the surgical site in primary total hip arthroplasty: a randomised, controlled, observer-blinded study

Table 4 Postoperative outcomes

Variables	Group A (n = 40)	Group B (n = 40)	Group C (n = 39)	P values^△
Variables	Group A (n = 40)	Group B (n = 40)	Group C (n = 39)	P	P1	P2	P3
Hospital stay (days)	2.9 ± 1.0	2.9 ± 0.8	2.8 ± 0.9	0.869
Pain satisfaction (n)
Very satisfied	25	26	15	0.033^△△	0.816	0.033^△△	0.018^△△
Somewhat satisfied	15	14	24	0.033^△△	0.816	0.033^△△	0.018^△△
Somewhat dissatisfied	0	0	0
Very dissatisfied	0	0	0
Function satisfaction (n)
Very satisfied	18	19	18	0.975	0.823	0.918	0.905
Somewhat satisfied	22	21	21	0.975	0.823	0.918	0.905
Somewhat dissatisfied	0	0	0
Very dissatisfied	0	0	0
Straight leg raise (n)	31	28	18	0.010^△△	0.446	0.004^△△	0.032^△△
Range of motion (°)
Flexion	106.0 ± 5.8	104.3 ± 6.3	103.5 ± 6.4	0.176
Abduction	33.3 ± 3.7	32.9 ± 3.4	33.5 ± 3.8	0.768
Extension	0	0	0

Values are the mean ± SD or count as appropriate
^△From one-way analysis of variance for independent means for continuous variables or the chi-square test for independent proportions amongst the three groups. P p value of group A vs B vs C; P1 p value of group A vs B; P2 p value of group A vs C; P3 p value of group B vs C
^△△Significant

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