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Relationship between dietary patterns and COPD: a systematic review and meta-analysis

Michael K. Parvizian, Manreet Dhaliwal, Jeremy Li, Imran Satia, Om P. Kurmi
ERJ Open Research 2020 6: 00168-2019; DOI: 10.1183/23120541.00168-2019
Michael K. Parvizian
1Dept of Medicine, McMaster University, Hamilton, ON, Canada
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Manreet Dhaliwal
1Dept of Medicine, McMaster University, Hamilton, ON, Canada
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Jeremy Li
1Dept of Medicine, McMaster University, Hamilton, ON, Canada
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Imran Satia
2Dept of Medicine, Division of Respirology, McMaster University, Hamilton, ON, Canada
3Faculty of Biology, Medicine and Health, Division of Infection, Immunity and Respiratory Medicine, University of Manchester, Manchester, UK
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Om P. Kurmi
2Dept of Medicine, Division of Respirology, McMaster University, Hamilton, ON, Canada
4Population Health Research Institute, McMaster University, Hamilton, ON, Canada
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  • ORCID record for Om P. Kurmi
  • For correspondence: kurmio@mcmaster.ca
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  • FIGURE 1
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    FIGURE 1

    Preferred Reporting Items for Systematic Review and Meta-analysis diagram of article identification, screening and selection.

  • FIGURE 2
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    FIGURE 2

    Forest plot of healthy dietary patterns and prevalence of COPD in cross-sectional studies. IV: inverse variance; df: degrees of freedom. Error bars represent 95% confidence intervals.

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    FIGURE 3

    Forest plot of healthy dietary patterns and incidence of COPD in cohort studies. RR: risk ratio; IV: inverse variance; df: degrees of freedom. Error bars represent 95% confidence intervals.

  • FIGURE 4
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    FIGURE 4

    Forest plot of unhealthy dietary patterns and prevalence of COPD in cross-sectional studies. IV: inverse variance; df: degrees of freedom. Error bars represent 95% confidence intervals.

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  • TABLE 1

    Characteristics of included studies

    First author [ref.], yearCountryStudy designTotal subjectsAge of participants yearsHow COPD was diagnosedOutcomes of interestFactors adjusted for in analysisDietary patterns investigated
    Ardestani [22], 2017IranCase–control164Mean 57Spirometric (FEV1/FVC <0.70 or FEV1 <80% pred)OR, FEV1, FVC, FEV1/FVCUnadjustedDASH (H)
    Brigham [62], 2018USACohort15 256Mean 54.2Spirometric (FEV1 and FEV1/FVC <LLN)PR, FEV1, FVC, FEV1/FVCAge, sex, race, education, study location, smoking (status and pack-years), physical activity, total energy intake, BMIWestern (U), prudent (H)
    Fischer [36], 2019SwedenCase–control1802Mean 55Doctor diagnosisORHigher education, living alone, number of daily cigarettesMediterranean (H)
    Maisonneuve [20], 2016ItalyCohort4336Median 57Radiological (CT)ORAge, sex, smoking duration, smoking intensity, years of smoking cessation, asbestos exposure, total energyMediterranean (H)
    McKeever [19], 2010NetherlandsCross-sectional12 648Range 20–59Spirometric (GOLD stage ≥2)ORAge, sex, age squared, height, age×height, smoking status, pack-years, BMI, educational levelCosmopolitan (H), traditional (U), refined-foods (U)
    Ogunmoroti [18], 2016USACohort6506Mean 62.0Doctor diagnosis (discerned through ICD-9 codes)HRAge, sex, race/ethnicity, education, incomeAHA criteria (H)
    Shaheen [21], 2010UKCohort2942Mean 65.7 males, 66.6 femalesSpirometric (FEV1/FVC <LLN)ORAge, height, smoking status, pack-years, smoke in home, age left education, home ownership, number of rooms, cars, social class, fat mass, activity score, energy intake, alcohol, dietary supplement use, birth weight, father's social class at birth, inhaled or oral steroid use, paracetamol usePrudent (H)
    Steinemann [63], 2018SwitzerlandCohort2178Mean 58.6Spirometric (FEV1/FVC<0.70)ORStudy site, sex, age, height, smoking status, pack-years, number of daily cigarettes, exposure to passive smoking in the last 12 months, parental smoking in childhood, educational level, civil status, employment status, physical activity, total energy intake, BMIPrudent (H), high-carbohydrate (U), Western (U)
    Varasso [16], 2007USACohort42 917Range 40–75Doctor diagnosis and spirometry or radiology (CXR or CT)RRAge, energy intake, smoking status, pack-years, race/ethnicity, physician visits, US region, BMI, physical activity, multivitamin usePrudent (H), Western (U)
    Varasso [37], 2007USACohort72 043Range 30–55Doctor diagnosis and spirometry or radiology (CXR or CT)RRAge, smoking status, pack-years, exposure to second-hand tobacco smoke, menopausal status, race/ethnicity, spouse's educational attainment, physician visits, US region, physical activity, multivitamin use, energy intakePrudent (H), Western (U)
    Varasso [17], 2015USACohort120 254Range 40–75 males, 30–55 femalesDoctor diagnosis and spirometry or radiology (CXR or CT)HRAge, physical activity, BMI, total energy intake, smoking status, pack-years, second-hand tobacco exposure, race/ethnicity, physician visits, US region, spouse, highest educational attainment, menopausal statusAlternate Healthy Eating Index (H)
    Voortman [38], 2017NetherlandsCohort9701Median 64.1Spirometric (FEV1/FVC <0.70) or doctor diagnosisHRAge, subcohort, sex, smoking status, education level, employment status, total energy intake, physical activity, BMIDutch Dietary Guidelines (H)

    FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; LLN: lower limit of normal; CT: computed tomography; GOLD: Global Initiative for Chronic Obstructive Lung Disease; ICD-9: International Classification of Diseases, ninth revision; CXR: chest radiography; PR: prevalence ratio; HR: hazard ratio; RR: risk ratio; BMI: body mass index; DASH: Dietary Approaches to Stop Hypertension; H: healthy; U: unhealthy; AHA: American Heart Association; AHEI: Alternative Healthy Eating Index.

    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.

      Tables S1-S7 00168-2019.SUPPLEMENT

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    Relationship between dietary patterns and COPD: a systematic review and meta-analysis
    Michael K. Parvizian, Manreet Dhaliwal, Jeremy Li, Imran Satia, Om P. Kurmi
    ERJ Open Research Apr 2020, 6 (2) 00168-2019; DOI: 10.1183/23120541.00168-2019

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    Relationship between dietary patterns and COPD: a systematic review and meta-analysis
    Michael K. Parvizian, Manreet Dhaliwal, Jeremy Li, Imran Satia, Om P. Kurmi
    ERJ Open Research Apr 2020, 6 (2) 00168-2019; DOI: 10.1183/23120541.00168-2019
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