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Table 2 Characteristics of the treatment group and the control groups after propensity score matching

From: Long-term effectiveness of a disease management program to prevent diabetic nephropathy: a propensity score matching analysis using administrative data in Japan

Characteristics

Treatment

Control group 1 Screened candidate

Control group 2 Beneficiary within inclusion criteria

Standardized difference

treatment—control group1

Standardized difference

treatment—control group2

N = 

139

N = 

412

N = 

416

Age (mean (SD)) (years)

68.1

(3.8)

67.9

(4.0)

68.5

(4.1)

0.051

-0.101

Sex (male %)

83

(59.7)

266

(64.6)

246

(59.1)

-0.100

0.012

Diabetes treatment medication (n, %)

  Oral

105

(75.5)

295

(71.6)

321

(77.2)

0.089

-0.038

  Insulin

34

(24.5)

117

(28.4)

95

(22.8)

-0.089

0.038

Medication for cardiovascular risk control (n, %)

  Anti-platelet

38

(27.3)

113

(27.4)

126

(30.3)

-0.002

-0.065

  Anti-hyperlipidemic

85

(61.2)

258

(62.6)

272

(65.4)

-0.030

-0.088

  Anti-hypertensives

102

(73.4)

298

(72.3)

301

(73.4)

0.024

0.023

  Cardiorenal protective agents (n, %)

89

(64.0)

263

(63.8)

263

(63.2)

0.004

0.017

Charlson Risk Index (n, %)

  1

114

(82.0)

334

(81.1)

327

(78.6)

0.024

0.086

  2

22

(15.8)

66

(16.0)

81

(19.5)

-0.005

-0.096

  3 or more

3

(2.2)

12

(2.9)

8

(1.9)

-0.048

0.017

Utilization patterns (annual) (mean (SD))

  Medical cost (USD)

4,991

(3,871)

5,014

(5,614)

5,808

(5,741)

-0.005

-0.167

  Number of Physician visits

32.4

(37.1)

30.4

(33.5)

35.2

(38.5)

0.057

-0.074

  Hospitalization days

2.4

(9.9)

2.0

(10.6)

2.0

(8.0)

0.039

0.044