Table 1 Characteristics of patient readmissions

Gender

 female

49,938(67.0%)

5,073(51.3%)

956.98

P<0.001

 male

24,556(33.0%)

4,822(48.7%)

Marital status

 Married/partner

68,879(92.4%)

8,236(83.2%)

 Separated/divorced

1,395(1.9%)

224(2.3%)

1,117.38

P<0.001

 single

2,959(4.0%)

1,055(10.7%)

 Widowed/other

1,261(1.7%)

380(3.8%)

Age years

 18≤-<30

3,513(0.5%)

1,243(12.5%)

 30≤-<39

7,631(10.2%)

1,213(12.3%)

 40≤-<49

21,653(29.1%)

1,929(19.5%)

 50≤ -<59

21,346(28.7%)

2,074(21.0%)

2584.87

P<0.001

 60≤-<69

15,463(20.8%)

1,941(19.6%)

5

 70≤ -<79

4,213(5.7%)

1,079(10.9%)

 ≥ 80

675(0.9%)

416(4.2%)

Mean(SD)

51.59(12.41)

51.71(16.83)

-0.64

p<0.52

LOS (days)

 1≤-<4

49,936(67.0%)

4,600(46.5%)

 4≤-<7

11,397(15.3%)

1,374(13.9%)

 7≤-<14

9,560(12.8%)

2,173(22.0%)

3382.70

P<0.001

 14≤-<20

1,612(2.2%)

737(7.4%)

8

 20≤-<30

1,297(1.7%)

644(6.5%)

 ≥ 30

692(0.9%)

367(3.7%)

Mean(SD)

4.09(6.78)

8.04(12.19)

31.57

P<0.001

IDR (days)

 1 ≤-<3

1,262(1.7%)

1,093(11.0%)

 3 ≤-<5

936(1.3%)

364(3.7%)

 5≤<7

3,485(4.7%)

1,165(11.8%)

 7 ≤ <10

10,159(13.6%)

790(8.0%

4285.42

P<0.001

 10≤ <20

16,980(22.8%)

1,964(19.8%)

5

 20≤ <30

41,672(55.9%)

4,519(45.7%)

Mean(SD)

18.54(7.96)

16.18(10.01)

22.54

P<0.001

No stay in ICU

74,394(99.9%)

9,704(98.1%)

819.92

P<0.001

Stay in ICU

100(0.1%)

191(1.9%)

Surgery

 No

47,694(64.0%)

4,131(41.7%)

1,828.96

P<0.001

 Yes

26,800(36.0%)

5,764(58.3%)

Health insurance

 Yes

67,765(91.1%)

8,395(84.8%)

372.67

P<0.001

 No

2322(3.1%)

525(5.3%)

 Missing

4407(5.8%)

975(9.9%)