Which patient-specific and surgical characteristics influence postoperative pain after THA in a fast-track setting?

Table 4 Regression coefficients with 95% CIs for potential factors associated with increased postoperative pain after THA in a fast-track setting

		Univariable analyses		Multivariable analysis
		coefficient (95% CI)	p-value	coefficient (95% CI)	p-value
Age		0.006 (−0.02–0.03)	0.66	–	–
BMI		0.03 (−0.03–0.09)	0.28	–	–
Gender	male vs. female	−0.31 (−0.79–0.18)	0.22	–	–
ASA classification	ASA2 vs. ASA1	0.30 (−0.21–0.80)	0.25	–	–
Surgery time		−0.01 (−0.03–0.0005)	0.06	0.0004 (−0.01–0.01)	0.96
Diabetes Mellitus		−0.05 (−0.88–0.78)	0.92	–	–
Incision length		0.02 (−0.26–0.31)	0.89	–	–
Living situation	with cohabitants vs. alone	0.53 (−0.05–1.10)	0.08	0.50 (−0.08–1.07)	0.11
Preoperative antidepressants use	yes vs. no	0.66 (−0.39–1.71)	0.22	–	–
Preoperative pain medication use	yes vs. no	0.68 (0.18–1.18)	0.009	0.78 (0.28–1.26)	0.005
Preoperative pain		0.10 (−0.01–0.21)	0.08	−0.02 (−0.13–0.09)	0.73
DN4	likely vs. unlikely	0.70 (0.13–1.28)	0.02	0.68 (0.15–1.20)	0.02
APAIS anxiety	yes vs. no	−0.06 (−0.67–0.54)	0.84	–	–
APAIS information	average vs. no/little	−0.02 (−0.61–0.56)	0.93	−0.21 (−0.74–0.31)	0.45
	high vs. no/little	0.50 (−0.16–1.15)	0.15	0.45 (−0.12–1.02)	0.15

Factors that were associated with the outcome in univariable analyses (p-values <0.20) were included in a multivariable linear mixed model for repeated measures. In the multivariable analyses p-values <0.05 were considered significant

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