The phrase "asthma defined as" is correct and usable in written English.
You can use it when introducing a definition or explanation of asthma in a formal or academic context.
Example: "Asthma defined as a chronic respiratory condition can lead to difficulty in breathing and wheezing."
Alternatives: "asthma described as" or "asthma characterized as".
We also found homozygosity of the rs4950928 G allele to be positively associated with atopic asthma (defined as as a positive test for specific IgE to at least one of four common inhalant allergens combined with self-reported physician-diagnosed asthma) with the highest OR among never-smokers indicating that smoking does not enhance the OR.
Based on these results, a multicentre randomized controlled study will start later this year to evaluate whether early management with NHF may prevent failure in comparison with conventional oxygen (and therefore escalation to NIV or IV) in patients with moderate-to-severe asthma defined as an acidosis (pH < 7.35) or a PRAM score >7 after optimal care in the emergency department.
Physician diagnosed asthma defined as asthma confirmed by a doctor.
Self-reported asthma defined as respondent ever had asthma.
The outcome was the rate of infants with uncontrolled asthma, defined as above.
Main outcome measure Asthma defined as having both an asthma diagnosis and dispensed asthma drugs.
We conducted a spatial case-control study, in which 'cases' were defined as individuals aged under 19 years of age with more severe asthma (defined here as two or more emergency department contacts with asthma in a defined 5-year period) versus age- and gender-matched 'controls' with less severe asthma (defined here as one emergency department contact for asthma).
"Current asthma" was defined as asthma ever plus having had wheezing or having used asthma medication in the preceding 12 months (Font-Ribera et al. 2009).
Persistent asthma was defined as reporting asthma (either attack of asthma in preceding 12 months or current medication for asthma) in both surveys.
New-onset (incident) of asthma was defined as reporting asthma (either attack of asthma in preceding 12 months or current medication for asthma) in ECRHS II (follow-up) excluding people who reported asthma (same definition as above) or a history of asthma in ECRHS I (baseline).
Severe asthma is defined as asthma which requires treatment with high dose inhaled corticosteroids and with a second controller drug to prevent it from becoming uncontrolled or which remains uncontrolled despite this therapy.
