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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