The impact of age and preoperative health-related quality of life on patient-reported improvements after total hip arthroplasty

Figures & data

Figure 1 Flowchart over study population.

Abbreviation: THA, total hip arthroplasty.

Table 1 Patient characteristics for THA operated at Regional Hospital West Jutland, Denmark September 2008–December 2013, who answered one or more of three questionnaires

	Total	Age <60 years	Age 60–69 years	Age 70–79 years	Age >79 years
Total, n (%)	1,610 (100)	329 (100)	571 (100)	548 (100)	169 (100)
Women	769 (47.8)	129 (39.2)	251 (44)	277 (50.6)	113 (66.9)
Men	841 (52.2)	200 (60.8)	320 (56)	271 (49.4)	56 (33.1)
Age, mean (SD)	68.9 (10.15)
EQ-5D index score
Preoperatively
Mean	0.63	0.64	0.65	0.63	0.52
SD	0.20	0.18	0.19	0.20	0.23
Median	0.72	0.72	0.72	0.72	0.59
3 months
Mean	0.85	0.82	0.86	0.89	0.81
SD	0.15	0.17	0.14	0.14	0.15
Median	0.82	0.82	0.83	0.84	0.82
12 months
Mean	0.89	0.88	0.91	0.90	0.82
SD	0.14	0.16	0.13	0.14	0.15
Median	1.00	1.00	1.00	1.00	0.82

Abbreviations: EQ-5D, EuroQol-5 Domain; SD, standard deviation; THA, total hip arthroplasty.

Table 2 Association between age and change between preoperative and postoperative patient-reported HRQoL

	Unadjusted analysis		Adjusted analysisa
	Coefficients (95% CI)	p-value	Coefficients (95% CI)	p-value
0–3 months, n=1,086	0.0026	<0.001	0.0026	<0.001
	(0.0013–0.0039)		(0.0013; 0.0039)
0–12 months, n=1,283	0.0021	<0.001	0.0020	0.001
	(0.0009–0.0033)		(0.0008; 0.0032)

Note:

a Analysis adjusted for sex.

Abbreviations: CI, confidence interval; HRQoL, health-related quality of life.

Table 3 Association between preoperative HRQoL and change between preoperative and postoperative patient-reported HRQoL

Follow-up	Unadjusted analysis		Adjusted analysisa
	Coefficients (95% CI)	p-value	Coefficients (95% CI)	p-value
0–3 months, n=1,086	−0.842	<0.001	−0.841	<0.001
	(−0.887; −0.797)		(−0.886; −0.795)
0–12 months, n=1,283	−0.799	<0.001	−0.804	<0.001
	(−0.839; −0.759)		(−0.844; −0.764)

Note:

a Analysis adjusted for sex and age.

Abbreviations: CI, confidence interval; HRQoL, health-related quality of life.