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Persistence of chronic cough in a community-based population

Anne M. Lätti, Juha Pekkanen, Heikki O. Koskela
ERJ Open Research 2020 6: 00229-2019; DOI: 10.1183/23120541.00229-2019
Anne M. Lätti
1Unit for Medicine and Clinical Research, Pulmonary Division, Kuopio University Hospital, Kuopio, Finland
2School of Medicine, Institute of Clinical Sciences, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
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  • For correspondence: anne.latti@kuh.fi
Juha Pekkanen
3Dept of Public Health, University of Helsinki, Helsinki, Finland
4Environmental Health Unit, National Institute for Health and Welfare, Kuopio, Finland
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Heikki O. Koskela
1Unit for Medicine and Clinical Research, Pulmonary Division, Kuopio University Hospital, Kuopio, Finland
2School of Medicine, Institute of Clinical Sciences, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
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  • FIGURE 1
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    FIGURE 1

    Flow chart of the study population.

Tables

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  • TABLE 1

    Differences of baseline characteristics between subjects who presented cough and those who did not develop cough at the 12-month follow-up

    Characteristic at baselineSubjects with cough at follow-up (n=165)Subjects without cough at follow-up (n=40)p-value
    Somatic symptom sum3.89 (3.50–4.28)2.38 (1.77–2.98)<0.001
    Duration of the cough episode median (range)12–60 months (2 months to >10 years)2–12 months (2 months to >10 years)0.001
    Trigger sum5.60 (5.14–6.07)4.05 (2.98–5.12)0.003
    Presence of a chemical trigger84.8%65.0%0.004
    Gastroesophageal reflux disease22.4%7.5%0.033
    Current daily smoking10.3%0%0.034
    Family members1.58 (1.40–1.76)2.00 (1.59–2.41)0.051
    Wheezing52.1%37.5%0.097

    Data are presented as mean (95% CI), unless otherwise stated. Characteristics with at least a suggestive association (p<0.10) are presented and based on chi-squared and Mann–Whitney U-tests.

    • TABLE 2

      The characteristics at baseline of the 205 subjects who responded to the follow-up survey in 2018

      Age years mean±sd52.1±9.0
      Female sex176 (85.9%)
      Body mass index kg·m−2 mean±sd28.1±5.6
      Current smokers17 (8.3%)
      Ex-smokers51 (24.9%)
      Pet ownership81 (39.5%)
      Moisture damage in workplace or at home72 (35.1%)
      Presence of gastro-oesophageal reflux disease with proton-pump inhibitors
      Patients receiving medication
      40 (19.5%)
      25 (62.5%)
      Presence of doctor diagnosed asthma with asthma medication
      Patients receiving medication
      62 (30.2%)
      60 (96.8%)
      Presence of chronic rhinitis treated with any kind of nasal sprays
      Patients receiving medication
      82 (40.0%)
      50 (61.0%)
      • Data are presented as n (%), unless otherwise stated.

    • TABLE 3

      Multivariate adjusted odds ratios (aOR) between characteristics at baseline in 2017 and the presence of cough at the 12-month follow-up

      Characteristic at baselineaOR (95% CI)p-value
      Gastro-oesophageal reflux disease5.02 (1.10–22.83)0.037
      Presence of a chemical trigger2.88 (1.20–7.00)0.018
      Duration of cough more than 1 year2.80 (1.27–6.22)0.011
      Somatic symptom sum#1.31 (1.07–1.59)0.008
      Number of family members¶0.71 (0.52–0.98)0.034

      #: per individual somatic symptom; ¶: per number of family members other than the respondent.

      Supplementary Materials

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        Please note: supplementary material is not edited by the Editorial Office, and is uploaded as it has been supplied by the author.

        Cough in Savo and Central Finland: the questionnaire 00229-2019.supplement

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      Persistence of chronic cough in a community-based population
      Anne M. Lätti, Juha Pekkanen, Heikki O. Koskela
      ERJ Open Research Apr 2020, 6 (2) 00229-2019; DOI: 10.1183/23120541.00229-2019

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      Persistence of chronic cough in a community-based population
      Anne M. Lätti, Juha Pekkanen, Heikki O. Koskela
      ERJ Open Research Apr 2020, 6 (2) 00229-2019; DOI: 10.1183/23120541.00229-2019
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