Figure 0个  Table 1个
    • Risk factors No. severe cases
      (n = 249)      		 No. common cases
      (n = 512)      		 χ2 P
      Age 0-4 year 202 373 6.21 0.01 < P < 0.05
      > 5 year 47 139
      sex Male 136 283 0.03 > 0.05
      Female 113 229
      Residence areas Rural 182 268 29.84 < 0.01
      Urban 67 244
      Breast feeding No 24 68 2.09 > 0.05
      Yes 225 444
      Premature delivery No 246 505 0.02* > 0.05
      Yes 3 7
      Pathogen EV71 62 118 13.13 < 0.01
      CA16 8 53
      Other EV 4 24
      Fever Non-fever 8 186 270.96 < 0.01
      < 39℃ 111 245
      ≥39℃ 130 81
      Convulsions No 29 506 609.87 < 0.01
      Yes 220 6
      Hand or foot shaking No 32 508 606.41 < 0.01
      Yes 217 4
      Hospital first visited Community or individual physician 164 31 314.44 < 0.01
      Municipal or county 85 481
      Respiratory infection 1 month prior Yes 145 15 308.57 < 0.01
      No 104 497
      Contact with confirmed cases 1 week prior Yes 139 27 251.00 < 0.01
      No 110 485
      *Determined using the calibrated chi-square test.

      Table 1.  Associated risk factors according to the univariate analysis