Table 2 Univariate analyses of clinical characteristics and SSD

Gender

33.816

 < .001

76.701

 < .001

 Male

251(36.2)

442(63.8)

1453(56.6)

1114(43.4)

 Female

747(49.5)

762(50.5)

2842(67.2)

1389(32.8)

Age group

-

-

39.444

 < .001

 60–69

-

-

1964(59.6)

1331(40.4)

 70–79

-

-

1720(65.6)

900(34.4)

  ≥ 80

-

-

623(69.3)

276(30.7)

Education

18.415

 < .001

4.793

.188

 Middle school and below

312(46.6)

358(53.4)

2233(64.1)

1248(35.9)

 High school

316(51.2)

301(48.8)

1234(61.4)

776(38.6)

 College

350(40.7)

509(59.3)

797(63.2)

465(36.8)

 Master and above

20(35.7)

36(64.3)

31(68.9)

14(31.1)

Marital status

1.638

.651

15.136

.002

 Never married

71(41.3)

101(58.7)

192(62.5)

115(37.5)

 Married

837(45.4)

1005(54.6)

3666(62.5)

2202(37.5)

 Divorced

11(47.8)

12(52.2)

67(74.4)

23(25.6)

 Widowed

79(47.9)

86(52.1)

370(69.4)

163(30.6)

Hypertension

40.444

 < .001

40.384

 < .001

 Yes

243(59.4)

166(40.6)

2415(66.7)

1206(33.3)

 No

756(42.1)

1041(57.9)

1892(59.3)

1301(40.7)

Diabetes mellitus

33.488

 < .001

54.448

 < .001

 Yes

124(65.3)

66(34.7)

1222(70.6)

509(29.4)

 No

875(43.4)

1141(56.6)

3085(60.7)

1998(39.3)

Cardio/Cerebrovascular disease

55.192

 < .001

307.888

 < .001

 Yes

114(74.0)

40(26.0)

1521(79.6)

389(20.4)

 No

885(43.1)

1167(56.9)

2786(56.8)

2118(43.2)

Endocrine and metabolic disease except DM

0.126

.722

6.875

.009

 Yes

7(50.0)

7(50.0)

59(77.6)

17(22.4)

 No

992(45.3)

1200(54.7)

4248(63.0)

2490(37.0)

Other diseases

8.728

.003

17.632

 < .001

 Yes

21(72.4)

8(27.6)

100(81.3)

23(18.7)

 No

978(44.9)

1199(55.1)

4207(62.9)

2484(37.1)

Surgery

2.882

.090

3.343

.067

 Yes

4(100.0)

0(0.0)

55(73.3)

20(26.7)

 No

995(45.2)

1207(54.8)

4252(63.1)

2487(36.9)

Antipsychotic

7.611

.006

47.229

 < .001

 Yes

8(100.0)

0(0.0)

138(89.6)

16(10.4)

 No

991(45.1)

1207(54.9)

4169(62.6)

2491(37.4)