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Table 4 Subgroup analysis for persistent sputum production in subjects without post-nasal drip: multivariable analysis (N = 1766)

From: Gastroesophageal reflux disease is a risk factor for sputum production in the general population: the Nagahama study

Baseline factors

Persistent sputum production

OR

95% CI

p value

Age, per 10-year increase

1.12

1.04–1.21

0.002

Male sex

1.37

1.07–1.74

0.01

Smoking history (ex or current)

1.32

1.04–1.68

0.03

FSSG scores ≥ 8

1.68

1.34–2.11

< 0.0001

  1. FSSG Frequency Scale for Symptoms of Gastroesophageal Reflux Disease
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Respiratory Research

ISSN: 1465-993X

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