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Table 1 Baseline characteristics, including clinical characteristics, individual and neighbourhood SES, and outcomes

From: Comparison of individual and neighbourhood socioeconomic status in case mix adjustment of hospital performance in primary total hip replacement in Sweden: a register-based study

Variable

Mean/Proportion

Std deviation

Clinical characteristics

 Age

69.3

10.1

 Sex, proportion men

43%

 

 Comorbidity - Elixhauser index score

1.3

1.3

 EQ-5D, at surgery

0.26

0.32

 Pain, at surgery

2.5

0.8

 Bilateral surgery

1%

 

 Previous hip prosthesis

9%

 

Individual socioeconomic characteristics

 Income per year, Swedish krona

242,593

157,396

 Born in Sweden

86%

 

 Highest educational level: high

25%

 

 Highest educational level: medium

41%

 

 Highest educational level: low

33%

 

Neighbourhood socioeconomic characteristics

 Income per year, Swedish krona

258,834

65,990

 Born in Sweden

86%

 

 Highest educational level: high

35%

 

 Highest educational level: medium

44%

 

 Highest educational level: low

20%

 

Outcome variables

 Length of stay, orthopaedic unit, at surgery

4.0

2.8

 EQ-5D, one-year follow-up

0.63

0.40

 Pain, one-year follow-up

0.6

0.9