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Table 1 Cohort baseline characteristics for the whole group (n = 101) and comparing those with complete Chest radiograph resolution (n = 69) vs. those with persistent abnormality (n = 32)

From: Risk factors for persistent abnormality on chest radiographs at 12-weeks post hospitalisation with PCR confirmed COVID-19

Variable

Whole Group (n = 101)

Complete Resolution (n = 69)

Persistent CXR Abnormality (n = 32)

p value

Sex (male)

53.5% (n = 54)

52.2% (n = 36)

56.3% (n = 18)

0.702

Age (years)

53.0 (45–63)

52.0 (42.5–62.5)

57.0 (50.3–63.8)

0.132

Length of Stay (days)

9 days (5–17.5)

8.0 (3–10.5)

20.5 (8.3–32.5)

0.001**

Follow-up CXR interval (days)

82 (77–86)

83.0 (76.0–90.0)

81.5 (65—87.5)

0.371

Admission to follow-up interval (days)

96 (94–98)

97.0 (94–112.5)

110.5 (95.2–126.0)

0.107

Level 2 or 3 Care

48.5% (n = 49)

39.1% (n = 27)

68.8% (n = 22)

0.006**

IMV

29.7% (n = 30)

21.7% (n = 15)

46.9% (n = 15)

0.010*

CPAP/NIV

18.8% (n = 19)

17.4% (n = 12)

21.9% (n = 7)

0.592

ECMO

3.0% (n = 3)

1.4% (n = 1)

6.3% (n = 2)

0.235

Oxygen or higher respiratory support

83% (n = 84)

81.2% (n = 56)

87.5% (n = 28)

0.428

BAME

35% (n = 35)

34.8% (n = 24)

34.4% (n = 11)

0.985

Obesity (BMI > 30 kg/m2)

28% (n = 28)

23.2% (n = 16)

34.4% (n = 11)

0.237

Hypertension

36% (n = 36)

31.9% (n = 22)

43.8% (n = 14)

0.247

Diabetes Melitus (all types)

18% (n = 19)

17.4% (n = 12)

21.9% (n = 7)

0.592

Asthma

15% (n = 15)

13% (n = 9)

18.8% (n = 6)

0.549

COPD

2% (n = 2)

0% (n = 0)

6% (n = 2)

0.098

Ischaemic Heart Disease

8% (n = 8)

5.8% (n = 4)

12.5% (n = 4)

0.259

Current or Ex-smoker

35% (n = 35)

24% (n = 16)

56% (n = 19)

0.002**

  1. Values presented as Median (Interquartile range) for continuous variables and percentage (n) for categorical variables. CXR-chest radiograph, Level 2—High Dependancy Facility, Level 3-Intensive Care Facility, IMV invasive mechanical ventilation, CPAP continuous positive pressure ventilation, NIV non invasive ventilation, ECMO extracorporeal membrane oxygenation, COPD chronic obstructive pulmonary disease, BAME Black, Asian and Minority Ethnic, BMI body mass index (kg/m2)
  2. *p < 0.05
  3. **p < 0.01. Comparison of data for complete resolution vs. persistent CXR abnormality assessed using the Mann–Whitney U Test