Table 3

Results of univariate logistic regression analysis testing for a change in each indicated variable over time

Year

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

1998-2008

N

24,421

24,252

24,646

24,716

23,047

23,011

21,413

21,224

22,555

21,040

23,326

Slope/OR

CI

P-Value

Age, y

(SE)

70.97

(0.06)

70.95

(0.06)

71.11

(0.06)

71.25

(0.06)

71.25

(0.06)

71.04

(0.06)

70.9

(0.07)

71.03

(0.07)

71.12

(0.06)

71.16

(0.07)

71.06

(0.06)

0.005

-0.007-0.0016

0.41

% Male

57.26

57.64

57.29

57.3

56.92

56.8

57.05

57.42

57.39

57.32

57.72

1.001

0.998-1.003

0.63

% Medicare

71.72

71.73

73.1

73.19

74.68

74.95

73.07

73.7

73.92

73.43

70.98

1.002

1.000-1.005

0.08

% White

92.87

91.92

91.47

89.96

89.82

88.56

89.32

89.98

89.48

87.52

87.28

0.949

0.945-0.953

< 0.0001

Skerritt et al. BMC Neurology 2012 12:17   doi:10.1186/1471-2377-12-17