Patient reported outcomes measures (PROMs) trajectories after elective hip arthroplasty: a latent class and growth mixture analysis

Table 1 Baseline characteristics of the study population (n = 991) and preoperative and postoperative PROMs

	n	%	Mean	SD
Mean age, years	991		60.4	13.9
Sex
Female	483	48.7
Male	508	51.3
BMI, n (%)
Normal weight/underweight	340	35.6
Overweight (BMI ≥ 25, < 30)	402	42.1
Obese (BMI ≥ 30)	213	22.3
Diagnosis
Primary coxarthrosis	696	70.2
Other	295	29.8
ASA score
1	235	25.5
2	526	57.1
3	160	17.4
Incision
Anterior	294	29.9
Lateral	623	63.4
Posterior-lateral	66	6.7
Head diameter
≤ 32 mm	435	43.9
> 32 mm	556	56.1
Length of stay, d	991		6.8	2.6
Residents in Emilia-Romagna Region	459	46.3
M-CDS	459
0–1	124	27.0
2–4	189	41.2
5–6	68	14.8
7–9	37	8.1
≥ 10	41	8.9
PROMs baseline score
EQ-5D-3L	991		0.5	0.2
EQ-VAS	991		52.2	18.4
HOOS-PS	990		54.0	17.0
PROMs 6-months score
EQ-5D-3L	715		0.8	0.2
EQ-VAS	715		77.9	15.4
HOOS-PS	715		83.3	15.7
PROMs 12-month score
EQ-5D-3L	612		0.8	0.2
EQ-VAS	612		79.3	16.9
HOOS-PS	612		84.9	15.4