Table 1. Patient characteristics and underlying conditions.

Sex, M/F	n (%)
Smoking habit	43 (20.4)
Cardiac disease	35 (16.6)
Pulmonary emphysema	23 (10.9)
Alcoholic	20 (9.5)
Asthma	15 (7.1)
Diabetes mellitus	9 (4.3)
Liver disorder	8 (3.8)
Collagen disease	5 (2.4)
Malignancy	20 (9.5)
Lung cancer	3 (1.4)
Gastric cancer	2 (0.9)
Oesophageal cancer	4 (1.9)
Colon cancer	2 (0.9)
Laryngopharyngeal cancer	2 (0.9)
Presenting symptoms
Productive cough	184 (87.2)
Non-productive cough	24 (11.4)
Fever	139 (65.9)
Dyspnoea	28 (13.3)
General weakness	26 (12.3)