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 5 Complications

Variables	Group A (n = 40)	Group B (n = 40)	Group C (n = 39)	P values^※
Nausea and vomiting	1	2	1	1.000
Urinary retention	2	1	0	1.000
Pruritus	0	0	0
Aseptic fat liquefaction of wound	2	2	1	1.000
Superficial infection	0	0	0
Deep infection	0	0	0
Haematoma	0	0	0
Superficial wound necrosis	0	0	0

Values are counts
^※Chi-square or Fisher’s test for independent proportions amongst the three groups

ISSN: 1749-799X