No increased mortality after total hip arthroplasty in patients with a history of pediatric hip disease: a matched, population-based cohort study on 4,043 patients

Figures & data

Table 1. Characteristics of the population. Values are count (%)

	Unexposed	Exposed
Factor	n = 19,388	n = 4,043
Dead	1,879 (10)	351 (9)
Age
< 50	7,519 (39)	1,570 (39)
50–59	5,835 (30)	1,220 (30)
60–74	4,758 (25)	989 (25)
≥ 75	1,276 (7)	264 (7)
Female sex	12,488 (64)	2,600 (64)
CCI
0	18,263 (94)	3662 (91)
1–2	974 (5)	345 (9)
> 2	151 (1)	36 (1)
Income
1st quarter	4,945 (26)	1,062 (26)
2nd quarter	4,893 (25)	1,047 (26)
3rd quarter	4,869 (25)	987 (24)
4th quarter	4,667 (24)	943 (23)
Education
None	284 (2)	75 (2)
9 years	5,302 (27)	1,111 (28)
High school	8,387 (43)	1,824 (45)
University	5,415 (28)	1,033 (26)

CCI = Charlson’s Comorbidity Index

Figure 1. 90-day survival analysis for THA patients (exposed, n = 4,043) and controls (unexposed, n = 19,388).

Table 2. Overall mortality, adjusted for confounders (CCI, income, and education) and for matching variables (age group, sex, and place of residence)

Item	Crude HR (95% CI)	Adj. HR (95% CI)
All cases	0.9 (0.8–1.0)	0.8 (0.7–0.9)
LCPD	0.8 (0.6–1.3)	0.7 (0.4–1.3)
SCFE	0.9 (0.4–1.7)	2.1 (0.8–5.7)
DDH	0.9 (0.8–1.0)	0.8 (0.7–0.9)

Figure 2. Overall survival analysis for THA patients (exposed, n = 4,043) and controls (unexposed, n = 19,388).