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  • 1.
    Bermúdez Barón, Nicolás
    et al.
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health.
    Kankaanranta, Hannu
    Dept of Internal Medicine and Clinical Nutrition, Krefting Research Centre, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden; Faculty of Medicine and Health Technology, Tampere University, Respiratory Research Group, Tampere University, Tampere, Finland; Dept of Respiratory Medicine, Seinäjoki Central Hospital, Seinäjoki, Finland.
    Hedman, Linnea
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health.
    Andersson, Martin
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health.
    Stridsman, Caroline
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Medicine.
    Lindberg, Anne
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Medicine.
    Rönmark, Eva
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health.
    Backman, Helena
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health.
    Body mass index increase: a risk factor for forced expiratory volume in 1 s decline for overweight and obese adults with asthma2022In: ERJ Open Research, E-ISSN 2312-0541, Vol. 8, no 4, article id 00110-2022Article in journal (Refereed)
    Abstract [en]

    Background: With increasing prevalence of overweight and obesity, it is important to study how body mass index (BMI) change may affect lung function among subjects with asthma. There are few prospective studies on this topic, especially with separate analyses of those with normal and high BMI. The aim of the present study was to prospectively study the association between annual BMI change and annual lung function decline, separately among those with normal initial BMI and overweight/obesity, in an adult asthma cohort.

    Methods: A population-based adult asthma cohort was examined at study entry between 1986 and 2001 and at follow-up between 2012 and 2014 (n=945). Annual BMI change was analysed in association with annual decline in forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC) and FEV1 /FVC separately in those with normal weight (BMI 18.5–24.9) and overweight/obese subjects (BMI ⩾25) at study entry. Regression models were used to adjust for sex, age, smoking, inhaled corticosteroids use and occupational exposure to gas, dust or fumes.

    Results: Overweight/obese subjects had lower FEV1 and FVC but slower annual FEV1 and FVC decline compared to those with normal weight. After adjustment through regression modelling, the association between BMI change with FEV1 and FVC decline remained significant for both BMI groups, but with stronger associations among the overweight/obese (FEV1 B[Overweight/obese] =−25 mL versus B[normal weight] = −15 mL). However, when including only those with BMI increase during follow-up, the associations remained significant among those with overweight/obesity, but not in the normal-weight group. No associations were seen for FEV1 /FVC.

    Conclusions: BMI increase is associated with faster FEV1 and FVC decline among overweight and obese adults with asthma in comparison with their normal-weight counterparts.

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  • 2.
    Bermúdez Barón, Nicolás
    et al.
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health.
    Lindberg, Anne
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Medicine.
    Stridsman, Caroline
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Medicine.
    Andersson, Martin
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health.
    Hedman, Linnea
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health. Department of Health Sciences, Division of Nursing, Luleå University of Technology, Luleå, Sweden.
    Vikjord, Sigrid Anna
    Hunt Research Centre, Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway.
    Kankaanranta, Hannu
    Department of Respiratory Medicine, Seinäjoki Central Hospital, Seinäjoki, Finland; Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.
    Lundbäck, Bo
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Medicine. Department of Internal Medicine and Clinical Nutrition, Krefting Research Centre, University of Gothenburg Institute of Medicine, Goteborg, Sweden.
    Rönmark, Eva
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health.
    Backman, Helena
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health.
    Among respiratory symptoms, wheeze associates most strongly with impaired lung function in adults with asthma: A long-term prospective cohort study2021In: BMJ Open Respiratory Research, E-ISSN 2052-4439, Vol. 8, no 1, article id e000981Article in journal (Refereed)
    Abstract [en]

    Background: Asthma is a common disease and a major public health concern. Respiratory symptoms are related to its prognosis, which in turn associates with lung function. Still this association on a long-term basis is not entirely understood.

    Aim: To study the association of the type and number of respiratory symptoms with FEV 1 and FEV 1 decline in women and men with asthma.

    Method: A population-based cohort of adults with asthma was examined at study entry between 1986 and 2001 and at follow-up between 2012 and 2014, and n=977 had valid measurements of FEV 1 on both occasions. Data regarding respiratory symptoms at study entry (recurrent wheeze, dyspnoea, longstanding cough and productive cough) were analysed in relation to FEV 1 and annual decline in FEV 1, both unadjusted and adjusted for other potentially associated factors by linear regression.

    Results: For both sexes recurrent wheeze and dyspnoea were associated with lower FEV 1 at study entry and follow-up, while productive cough was associated with lower FEV 1 only at follow-up. No associations were found between the type of symptoms and annual decline in FEV 1. In adjusted analyses, the association between recurrent wheeze and lower FEV 1 both at study entry and follow-up remained significant among women. Also, the association between a higher number of symptoms with lower FEV 1 both at study entry and follow-up were present for both sexes and remained after adjustment.

    Conclusions: Particularly recurrent wheeze and a higher number of respiratory symptoms may predict lower lung function also in the long run among women and men with asthma.

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