Early postoperative mortality similar between cemented and uncemented hip arthroplasty: a register study based on Finnish national data

Figures & data

Table 1. Background characteristics of patients. Values are frequency (percentage) unless otherwise stated

Background	Cemented	Uncemented	Hybrid
characteristics	THA	THA	THA
Number of patients	23,636	38,477	11,802
Mean age	73.7	64.9	66.5
Men	8,277 (35)	18,747 (49)	5,636 (48)
Hypertension	11,104 (47)	15,771 (41)	4,725 (40)
Ischemic heart disease	4,234 (20)	4,135 (11)	1,466 (12)
Atrial fibrillation	1,868 (7.9)	2,082 (5.4)	676 (5.7)
Heart insufficiency	1,284 (5.4)	797 (2.1)	431 (3.7)
Diabetes	2,130 (9.0)	3,715 (9.7)	964 (8.2)
COPD and asthma	2,422 (10)	3,973 (10)	1,059 (9.0)
Cancer	1,833 (7.8)	2,575 (6.7)	724 (6.1)
Depression	1,522 (6.4)	2,688 (7.0)	704 (6.0)
Parkinson’s disease	283 (1.2)	381 (1.0)	111 (0.9)
Dementia	281 (1.2)	212 (0.6)	98 (0.8)
Uremia	30 (0.1)	61 (0.2)	19 (0.2)
Mental disorders	659 (2.8)	978 (2.5)	284 (2.4)

These results have not been adjusted via propensity score weighting.

THA = total hip arthroplasty.

Figure 1. Annual numbers of cemented, uncemented, and hybrid THA in Finland during the study period.

Figure 2. Relative and cumulative risk of death in patients receiving a cemented THA compared with patients receiving an uncemented THA. No statistically significant difference in mortality was found.

Table 2. Patient mortality, raw data. Values are frequency (percentage)

	Cemented	Uncemented	Hybrid
	THA	THA	THA
Mortality	n = 23,636	n = 38,477	n = 11,802
1–2 days	9 (0.0)	4 (0.0)	0 (0.0)
3–10 days	45 (0.2)	23 (0.1)	6 (0.1)
11–20 days	35 (0.1)	14 (0.0)	6 (0.1)
21–30 days	22 (0.1)	4 (0.0)	3 (0.0)
30 days	111 (0.5)	45 (0.1)	15 (0.1)
90 days	228 (1.0)	93 (0.2)	29 (0.2)
180 days	389 (1.6)	155 (0.4)	52 (0.4)
365 days	712 (3.0)	254 (0.7)	115 (1.0)

Table 3. Postoperative mortality risk (OR (95% CI)) for cemented and hybrid THA compared with uncemented THA (reference)

	Cemented THA	Hybrid THA
2 days	1.2 (0.2–6.5)	0 (0.0–999.9)
3–10 days	0.5 (0.3–1.1)	0.6 (0.3–1.6)
11–20 days	0.7 (0.3–1.8)	0.9 (0.3–2.5)
21–30 days	2.8 (0.8–10.0)	1.9 (0.4–8.8)
30 days	0.8 (0.5–1.3)	0.8 (0.4–1.4)
90 days	0.8 (0.6–1.1)	0.7 (0.5–1.1)
365 days	1.2 (1.0–1.4)	1.2 (0.9–1.5)

Table 4. Causes of death. Values are frequency (percentage)

	Cemented	Uncemented	Hybrid
	THA	THA	THA
Cause of death	n = 23,636	n = 38,477	n = 11,802
1–2 days
Pulmonary embolism	0	0	0
Other cardiovascular	5 (0.02)	4 (0.01)	0
3–10 days
Pulmonary embolism	1 (0.00)	2 (0.01)	0
All cardiovascular	11 (0.05)	19 (0.05)	4 (0.03)
11–20 days
Pulmonary embolism	5 (0.02)	1 (0.00)	1 (0.01)
All cardiovascular	15 (0.06)	9 (0.02)	5 (0.04)
21–30 days
Pulmonary embolism	3 (0.01)	1 (0.00)	0 (0.00)
All cardiovascular	8 (0.03)	3 (0.01)	2 (0.02)
90 days
Pulmonary embolism	15 (0.06)	14 (0.04)	4 (0.03)
All cardiovascular	76 (0.32)	60 (0.16)	22 (0.19)
365 days
Pulmonary embolism	30 (0.13)	20 (0.05)	7 (0.06)
All cardiovascular	208 (0.88)	127 (0.33)	62 (0.53)

All cardiovascular: acute myocardial infarction, ischemic heart disease, pulmonary embolism, heart failure, stroke. Follow-up of the causes of death is to the end of 2013.