Table 1 General and clinical characteristics of the study population

Virus Detection

n = 7019

n = 7986

Characteristics, n(%)

Gender

Male

4291(61.1)

4552(57.0)

26.380

< 0.0001

Female

2728(38.9)

3434(43.0)

Age

Children (< 5 years)

2128(30.3)

1390(17.4)

347.000

< 0.0001

School-age children (5‒17 years)

672(9.6)

1129(14.1)

73.650

< 0.0001

Adult (18‒59 years)

3191(45.5)

3655(45.8)

0.140

0.708

Older people (≥ 60 years)

1028(14.6)

1812(22.7)

157.500

< 0.0001

Case type, n(%)

Outpatients

60(0.9)

1427(17.9)

1533.000

< 0.0001

Inpatients

6959(99.1)

6559(82.1)

Virus Detection rate, n(%)

Overall detection rate

755(10.8)

1433(17.9)

154.900

< 0.0001

Mixed infections rate

0(0.0)

7(0.08)

6.155

0.131

Bacteria Detection

n = 5991

n = 3818

Characteristics, n(%)

Gender

Male

3842(64.1)

2183(57.2)

47.580

< 0.0001

Female

2149(35.9)

1635(42.8)

Age

Children (< 5 years)

47(0.8)

13(0.3)

7.562

0.006

School-age children (5‒17 years)

83(1.4)

82(2.1)

8.194

0.0042

Adult (18‒59 years)

4187(69.9)

2338(61.2)

78.380

< 0.0001

Older people (≥ 60 years)

1674(27.9)

1385(36.4)

75.460

< 0.0001

Case type, n(%)

Outpatients

24(0.4)

41(1.1)

16.060

< 0.0001

Inpatients

5967(99.6)

3777(98.9)

Bacteria Detection rate, n(%)

Overall detection rate

2130(35.6)

1341(35.1)

0.189

0.6639

Mixed infections rate

453(7.6)

271(7.1)

0.733

0.3921