Table 1 The comparison of CT sign frequency within the first 24 h post-onset among groups with poor and good prognoses

Prognosis at 3 months

Cases (N = 451) N

Poor prognosis (N = 214) N(%)

Good prognosis(N = 237) N(%)

P

OR

95% CI

Heterogeneous density

168

87(40.7)

81(34.2)

0.155

1.319

0.900,1.934

Irregular shape

216

119(55.6)

97(40.9)

0.002

1.808

1.244,2.627

Island sign

95

58(27.1)

37(15.6)

0.003

2.010

1.266,3.191

Satellite sign

117

62(29.0)

55(23.2)

0.163

1.350

0.885,2.059

Swirl sign

167

92(43.0)

75(31.6)

0.013

1.629

1.108,2.394

Black hole sign

50

34(15.9)

16(6.8)

0.002

2.609

1.395,4.879

Blend sign

87

47(22.0)

40(16.9)

0.172

1.386

0.867,2.216

Prognosis at 12 months

Cases (N = 451) N

Poor prognosis(N = 199) N(%)

Good prognosis(N = 252) N(%)

P

OR

95% CI

Heterogeneous density

168

79(39.7)

89(35.3)

0.339

1.206

0.821,1.770

Irregular shape

216

105(52.8)

111(44.0)

0.066

1.419

0.977,2.061

Island sign

95

56(28.1)

39(15.5)

0.001

2.139

1.350,3.389

Satellite sign

117

59(29.6)

58(23.0)

0.111

1.410

0.924,2.151

Swirl sign

167

82(41.2)

85(33.7)

0.103

1.377

0.937,2.023

Black hole sign

50

29(14.6)

21(8.3)

0.036

1.876

1.034,3.404

Blend sign

87

45(22.6)

42(16.7)

0.112

1.461

0.914,2.336