Table 1

Predictive value of symptom characteristics obtained from history

No with positive historyNo correctly identifiedPositive predictive value (%)
PNDS = postnasal drip syndrome; GORD = gastro-oesophageal reflux disease.
Reproduced from McGarvey et al11 with permission.
Asthma (nocturnal cough, precipitated by cold air, exercise, aerosols)271556
PNDS (throat clearing, sensation of postnasal drip, nasal discharge, previous sinusitis)271452
GORD (dyspepsia, cough worse after meals)20840