TABLE 1

Baseline characteristics of whole cohort and those having a chest radiograph within the first 7 days

Whole cohortCohort referred for radiograph within 1 week
Age ≥60 years10 903/28 883 (37.8%)326/720 (45.3%)
Female17 118/28 878 (59.3%)352/719 (49.0%)
Duration of illness <7 days14 006/28 883 (48.5%)411/720 (57.1%)
Received pneumovax in the past 10 years5301/28 883 (18.4%)169/720 (23.5%)
Ever smoked15 185/28 414 (53.4%)431/708 (60.9%)
Any comorbidity13 122/28 883 (45.4%)359/720 (49.9%)
Lung comorbidity7471/28 883 (25.9%)195/720 (27.1%)
On steroids or bronchodilators6547/27 570 (23.8%)174/677 (25.7%)
Living in top decile deprivation area (most deprived)5757/28 883 (19.9%)146/720 (20.3%)
Symptoms
 Shortness of breath18 533/28 764 (64.4%)525/714 (73.5%)
 Fever or chills13 698/28 836 (47.5%)352/718 (49.0%)
 Chest pain10 666/28 811 (37.0%)317/715 (44.3%)
 Confusion1861/28 865 (6.5%)49/720 (6.8%)
 Coryza15 736/28 785 (54.7%)318/714 (44.5%)
 Headache13 267/28 798 (46.1%)293/715 (41.0%)
 Muscle aches10 517/28 801 (36.5%)270/714 (37.8%)
 Diarrhoea2513/28 857 (8.7%)68/718 (9.5%)
 Sputum
  Purulent18 246/28 879 (63.2%)408/720 (56.7%)
  Bloody/rusty1026/28 879 (3.6%)100/720 (13.9%)
Clinical examination
 Severity assessment ≥5/1011 936/28 883 (41.3%)430/720 (59.7%)
 Respiratory rate ≥24·min–12904/28 766 (10.1%)117/718 (16.3%)
 Temperature ≥37.8°C1663/28 862 (5.8%)76/720 (10.6%)
 Pulse ≥100·min–12819/28 871 (9.8%)115/720 (16.0%)
 Oxygen saturation <95%1719/23 778 (7.2%)100/632 (15.8%)
 SBP ≤90 mmHg or DBP ≤60 mmHg2198/28 883 (7.6%)68/720 (9.4%)
 Crackles12 287/28 875 (42.6%)402/720 (55.8%)
 Bronchial breathing2173/28 870 (7.5%)83/720 (11.5%)
 Wheeze7084/28 873 (24.5%)218/720 (30.3%)

SBP: systolic blood pressure; DBP: diastolic blood pressure.