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Table 1 Pre-index demographic characteristics by insurance type and cohort

From: A retrospective study on the impact of comorbid depression or anxiety on healthcare resource use and costs among diabetic neuropathy patients

 

Medicare supplemental insurance

Commercial insurance

 

DN-only

DN-DA

 

DN-only

DN-DA

 

# Observations

16,831

1,699

p-value*

17,205

3,105

p-value*

Age (mean, SD)

75.6 (6.1)

75.4 (6.3)

0.44

55.0 (7.4)

53.7 (7.7)

< 0.05

Male (%)

52.9

44.2

< 0.05

53.7

41.1

< 0.05

Plan types (%)**

  

< 0.05

  

0.54

   Comprehensive

65.2

60.4

 

16.1

17.3

 

   PPO

21.6

21.9

 

47.3

45.8

 

   HMO

11.8

16.5

 

20.3

22.8

 

   Other

0.3

0.1

 

15.6

13.3

 

   Missing

1.1

1.0

 

0.8

0.9

 

Region (%)

  

< 0.05

  

0.19

   Northeast

10.8

8.5

 

8.1

8.0

 

   North central

41.3

42.1

 

29.9

31.4

 

   South

30.2

28.4

 

43.2

38.6

 

   West

16.7

20.1

 

18.0

21.1

 

   Missing

1.0

0.9

 

0.7

0.9

 
  1. Source: Thomson Medstat MarketScan database for patients with Medicare supplemental and commercial insurance (2004–2005)
  2. * Student t-tests for continuous variables and Cochran-Mantel-Haenszel tests for categorical variables were performed.
  3. ** HMO = Health Maintenance Organization; PPO = Preferred Provider Organization