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Table 6 Multivariate analysis of trends and factors associated with incidence for primary THA

From: Trends in primary total hip arthroplasty in Spain from 2001 to 2008: Evaluating changes in demographics, comorbidity, incidence rates, length of stay, costs and mortality

  

INCIDENCE OF HOSPITALIZATIONS FOR THA

  

Risk Rate Ratios (95% Confidence Intervals)*

  

Men

Women

Both

Age

40-54

-

-

-

 

55-64

2.96(2.89-3.03)

4.30 (4.17-4.43)

3.40 (3.34-3.46)

 

65-74

5.65 (5.52-5.77)

12.04 (11.71-12.38)

7.84 (7.71-7.97)

 

75-84

5.98 (5.84-6.12)

14.57 (14.17-14.98)

9.09 (8.93-9.25)

 

≥85

2.37 (2.25-2.50)

6.37 (6.14-6.21)

3.97 (3.86-4.08)

Sex

Women

NA

NA

-

 

Men

NA

NA

1.03 (1.02-1.04)

Reason for surgery

OA

-

-

-

 

Other

0,21 (0,20-0,22)

0,42 (0,41-0,43)

0,32 (0,31-0,33)

Charlson comorbidity index

0

-

-

-

 

1-2

0.24 (0.24-0.25)

0.25 (0.25-0.26)

0.25 (0.24-0.25)

 

>2

0.012 (0.011-0.013)

0.008 (0.008-0.009)

0.010 (0.009-0.011)

YEAR

2001

-

-

-

 

2002

1.04 (1.00-1.07)

1.04 (1.01-1.07)

1.04 (1.02-1.06)

 

2003

1.06 (1.03-1.09)

1.04 (1.01-1.07)

1.05 (1.03-1.07)

 

2004

1.04 (1.01-1.07)

1.04 (1.01-1.07)

1.04 (1.02-1.06)

 

2005

1.09 (1.06-1.12)

1.04 (1.01-1.07)

1.06 (1.04-1.08)

 

2006

1.11 (1.08-1.15)

1.05 (1.02-1.08)

1.08 (1.06-1.10)

 

2007

1.11 (1.08-1.15)

1.04 (1.01-1.07)

1.07 (1.05-1.09)

 

2008

1.15 (1.11-1.18)

1.07 (1.04-1.09)

1.10 (1.08-1.12)

  1. Calculated using multivariate Poisson regression Dependent variable "Incidence of hospitalizations for THA".
  2. The independent variables included in the models are those shown in the table.
  3. OA Osteoarthritis