Table 1 Baseline characteristics of patients with Chlamydia psittaci or COVID-19 pneumonia.

From: Comparison of clinical, laboratory and radiological characteristics between COVID-19 and Chlamydia psittaci pneumonia: a multicenter retrospective study

Variable

Total (n = 531)

Chlamydia psittaci (n = 81)

COVID-19 (n = 450)

p Value

Age, median (IQR), years

62.0 (54.0,69.0)

61.0 (55.0, 67.0)

62.0 (54.0, 69.0)

0.259

Age ≥ 65 years

212 (39.9)

26 (32.1)

186 (41.3)

0.118

Male, n (%)

287 (54.0)

46 (56.8)

241 (53.6)

0.591

Comorbidities, n (%)

    

Hypertension

234 (44.1)

20 (24.7)

214 (47.6)

 < 0.001

Diabetes

114 (21.5)

18 (22.2)

96 (21.3)

0.858

Coronary heart disease

70 (13.2)

9 (11.1)

61 (13.6)

0.549

Chronic liver diseases

28 (5.3)

14 (17.3)

14 (3.1)

 < 0.001

Chronic obstructive lung disease

44 (8.3)

8 (9.9)

36 (8.0)

0.573

Chronic kidney diseases

24 (4.5)

6 (7.4)

18 (4.0)

0.285

Cerebrovascular diseases

29 (5.5)

5 (6.2)

24 (5.3)

0.968

Malignancy

31 (5.8)

2 (2.5)

29 (6.4)

0.251

Vital signs

    

Respiration rate, median (IQR),

breaths per minute

22.0 (20.0, 25.0)

22.0 (20.0, 26.0)

21.5 (20.0, 25.0)

0.110

SpO2, median (IQR), %

92.0 (90.0, 93.0)

94.0 (91.0, 95.0)

92.0 (90.0, 93.0)

 < 0.001

Pulse, median (IQR), beats per minute

89.0 (79.0, 101.5)

93.0 (81.0, 106.0)

88.0 (79.0, 101.0)

0.026

MAP, median (IQR), mm Hg

95.7 (89.3, 105.7)

91.8 (84.7, 100.7)

96.7 (90.0, 106.0)

0.001

Symptom, n (%)

    

Fever

426 (80.2)

78 (96.3)

348 (77.3)

 < 0.001

Chills

15 (2.8)

8 (9.9)

7 (1.6)

 < 0.001

Cough

358 (67.4)

60 (74.1)

298(66.2)

0.165

Sputum

160 (30.1)

47 (58.0)

113 (25.1)

 < 0.001

Dyspnea

316 (59.5)

51 (63.0)

265 (58.9)

0.492

Sore throat

26 (4.9)

7 (8.6)

19 (4.2)

0.156

Myalgia

92 (17.3)

15 (18.5)

77 (17.1)

0.758

Fatigue

204 (38.4)

38 (46.9)

166 (36.9)

0.088

Gastrointestinal symptoms

123 (23.2)

15 (18.5)

108 (24.0)

0.282

Nervous system symptoms

81 (15.3)

38 (46.9)

43 (9.6)

 < 0.001

Disease severity scores

    

SOFA score, median (IQR)

2.0 (2.0, 3.0)

3.0 (2.0, 5.0)

2.0 (2.0, 3.0)

 < 0.001

CURB-65 score, median (IQR)

1.0 (0.0, 1.0)

1.0 (0.0, 2.0)

1.0 (0.0, 1.0)

0.001

  1. Data are presented as medians (IQR) and n (%). P values were calculated by Student t test, Mann–Whitney U test, Chi-square test or Fisher’s exact test, as appropriate. p values indicate differences between Chlamydia psittaci pneumonia and COVID-19 pneumonia. Abbreviations: IQR, interquartile range; SpO2, percutaneous oxygen saturation; MAP, mean arterial pressure; SOFA score, Sequential Organ Failure Assessment score.
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