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Demographics

Patient characteristics by diagnosis

Hip » Total hip arthroplasty » Demographics » Patient characteristics by diagnosis

TABLE Patient characteristics of all patients with a registered primary total hip arthroplasty by diagnosis in the Netherlands in 2021

	Osteoarthritis	Fracture	Osteonecrosis	Late post-traumatic	Dysplasia	Rheumatoid arthritis	Post-Perthes disease	Tumour	Total
N	26,874 (86.1%)	1,806 (5.8%)	819 (2.6%)	691 (2.2%)	412 (1.3%)	128 (0.4%)	73 (0.2%)	114 (0.4%)	31,199
Mean age (years) (SD)	69.9 (9.8)	69.6 (8.3)	63.8 (1.9)	68.3 (12.3)	51.3 (14.2)	64.2 (13.9)	53.2 (15.0)	63.6 (12.4)	69.4 (10.4)
Age (years) (%)
<50	3	1	18	7	41	12	33	14	4
50-59	12	9	18	14	32	19	30	21	13
60-69	29	35	24	28	17	30	19	28	29
70-79	40	46	23	33	9	32	16	31	39
≥80	16	9	17	18	1	8	1	6	15
Gender (%)
Men	35	36	43	41	30	23	77	42	35
Women	65	64	57	59	70	77	23	58	65
ASA score (%)
I	14	12	9	10	33	0	30	4	14
II	62	57	56	57	56	64	58	24	62
III-IV	23	31	36	34	11	36	12	72	24
Type of hospital (%)
General	77	95	83	88	66	81	81	65	79
UMC	1	4	10	6	16	10	3	35	2
Private	22	0	7	6	19	9	16	0	19
Charnley-score (%)
A One hip joint affected	41	57	55	79	51	34	65	60	43
B1 Both hip joints affected	31	13	20	9	29	22	17	13	30
B2 Contralateral hip joint with a total hip prosthesis	25	23	20	8	16	23	17	15	24
C Multiple joints affected or chronic disease that affects quality of life	3	7	5	4	4	21	2	13	3
Mean Body Mass Index (kg/m²) (SD)	27.3 (4.5)	25.0 (4.0)	26.8 (5.0)	25.4 (4.3)	26.4 (4.6)	27.5 (5.6)	27.4 (4.7)	26.0 (5.0)	27.1 (4.6)
Body Mass Index (kg/m²) (%)
Underweight (≤18,5)	1	3	3	3	1	3	0	3	1
Normal weight (>18,5-25)	34	53	40	50	44	30	37	44	36
Overweight (>25-30)	42	34	33	33	36	36	34	39	41
Obesity (>30-40)	22	10	24	14	18	27	27	13	21
Morbid obesity (>40)	1	0	1	0	1	3	1	2	1
Smoking (%)
No	92	90	83	83	87	91	79	88	91
Yes	8	10	17	17	13	9	21	12	9

Please note: In 2021, 184 (0.6%) patients received a primary THA after a diagnosis that is not listed in the table. Of 98 (0.3%) primary THAs the diagnosis was not registered.
General: general hospital; UMC: university medical centre; Private: private hospital; SD: standard deviation; THA: total hip arthroplasty.