Table 1 Characteristics of the imported and indigenous cases with COVID-19

Male (%)

238(49.8)

98(59.4)

140(44.7)

9.295

0.002

Age group

2.713

0.258

 Median (range),y

46(1–94)

44(1–89)

47(1–94)

  ≤ 18

32(6.7)

9(5.5)

23(7.3)

 19–64

358(74.9)

131(79.4)

227(72.5)

  ≥ 65

88(18.4)

25(15.2)

63(20.1)

City

18.564

< 0.001

 Beijing

299(62.6)

123(74.5)

176(56.2)

 Chongqing

140(29.3)

33(20.0)

107(34.2)

 Jinan

15(3.1)

6(3.6)

9(2.9)

 Nanning

24(5.0)

3(1.8)

21(6.7)

Spectrum of Disease

10.149

0.006

 Asymptomatic

48(10)

8(4.8)

40(12.8)

 Mild

347(72.6)

133(80.6)

214(68.4)

 Severe

83(17.4)

24(14.5)

59(18.8)

Symptoms

 Fever

333(69.7)

136(82.4)

197(62.9)

19.411

< 0.001

23.665

< 0.001

  < 37.3

145(30.3)

29(17.6)

116(37.1)

 37.3–38.0

177(37.0)

74(44.8)

103(32.9)

 38.1–39.0

142(29.7)

53(32.19)

89(28.4)

  > 39.0

14(2.9)

9(5.5)

5(1.6)

 Cough

227(47.5)

75(45.5)

152(48.6)

0.418

0.518

 Fatigue

117(24.5)

45(27.3)

72(23.0)

1.065

0.302

 Dyspnoea

40(8.4)

11(6.7)

29(9.3)

0.951

0.329

 Headache

38(7.9)

12(7.3)

26(8.3)

0.158

0.691

 Respiratory rate^a

20.4 ± 7.2

19.6 ± 3.3

20.9 ± 8.6

−2.322

0.021

Cluster cases

328(68.6)

83(50.3)

245(78.3)

39.258

< 0.001

 Family

254(53.1)

66(40.0)

188(60.1)

 Other

74(15.5)

17(10.3)

57(18.2)

History of Contact

435(91.0)

165(100.0)

270(86.3)

24.908

< 0.001

 Have been to Wuhan in 14 days

136(28.5)

136(82.4)

0(0.0)

360.580

< 0.001

 Have contacted the confirmed case in 14 days

285(59.6)

30(18.2)

255(81.5)

179.761

< 0.001

Outcomes

29.168

< 0.001

 Hospitalized

276(58.8)

68(41.2)

208(66.5)

 Discharged

198(41.4)

96(58.2)

102(32.6)

 Death

4(0.8)

1(0.6)

3(1.0)