Vitamin D levels in adults with non-atopic asthma: a case-control study

Vitamin D levels in adults with non-atopic asthma: a case-control study - Vitamin D in non-atopic asthma: a case-control study panama deel 5

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

NL-OMON

Registry ID

NL-OMON34269

Enrollment

216

Registered

2010-09-21

Start date

2010-11-01

Completion date

Unknown

Last updated

2025-03-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

asthma bronchitis

Interventions

None listed

Eligibility

Age

18 Years to 99 Years

Inclusion criteria

Inclusion criteria: Group 1: - Outpatients with non-atopic asthma, determined by negative alatop - Age * 18 yrs - Pulmonologist*s diagnosis of asthma - Documented reversibility in FEV1 of > 12% predicted OR airway hyperresponsiveness to inhaled methacholine Group 2: - Outpatients with atopic asthma, determined by known positive alatop or skin prick test - Age * 18 yrs - Pulmonologist*s diagnosis of asthma - Documented reversibility in FEV1 of > 12% predicted OR airway hyperresponsiveness to inhaled methacholine Group 3: - Subjects without pulmonary history or pulmonary complaints - Age * 18 yrs - No signs of allergy and negative alatop - Normal spirometry

Exclusion criteria

Exclusion criteria: Group 1: - Patients with smoking history of > 10 packyears and persistent airflow obstruction (post bronchodilator FEV1 10 packyears and persistent airflow obstruction (post bronchodilator FEV1

Design outcomes

Primary

Measure	Time frame
The difference between vitamin D levels of patients with non-atopic asthma and and patients with atopic asthma and the difference between vitamin D levels of patients with non-atopic asthmaand healthy non-atopic subjects .	—

Secondary

Measure	Time frame
virus serology Genetic tests Pulmonary function testing: spirometry ACQ (asthmatic patients) Medical consumption (asthmatic patients) Time spent outdoors	—

Countries

Netherlands

Outcome results