Table 2 Comparison of general characteristics between cases and controls.

From: A Case-control Study on Risk Factors for Severe Hand, Foot and Mouth Disease

General characteristics

Cases (n = 459)

Controls (n = 246)

OR (95% CI)

p-value

Premature birth

 Yes

19(4.3%)

10(4.2%)

1.0(0.5,2.3)

0.93

 No

424(95.7%)

230(95.8%)

Reference

 

Birth weight

3.5 ± 0.5

3.2 ± 0.4

2.9(2.0,4.2)

5*10−9(***)

Uterine-incision delivery

 Yes

253(56.9%)

150(62.8%)

0.8(0.6,1.1)

0.135(.)

 No

192(43.2%)

89(37.2%)

Reference

 

Breast-feeding

 Yes

312(70.3%)

221(92.5%)

0.2(0.1,0.3)

6*10−10(***)

 No

132(29.7%)

18(7.5%)

Reference

 

Complication during perinatal stage

 Yes

6(1.4%)

8(3.4%)

0.4(0.1,1.2)

0.099(·)

 No

437(98.7%)

231(96.7%)

Reference

 

congenital disease

 Yes

3(0.7%)

3(1.3%)

0.5(0.1,2.9)

0.44

 No

444(99.3%)

236(98.7%)

Reference

 

allergic history

 Yes

22(4.9%)

1(0.4%)

12.21(2.5,219,3)

0.015(**)

 No

429(95.1%)

238(99.6%)

Reference

 

Time interval between symptoms onset to being hospitalized (days)

3.6 ± 2.2

3.0 ± 1.7

1.2(1.1,1.3)

5.39*10−4(***)

  1. Signif.codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘.’.