The phrase "asthma were obtained" is not correct in standard written English.
It may be intended to describe data or information related to asthma, but the subject-verb agreement is incorrect.
Example: "The results of the study indicated that data on asthma were obtained from various sources."
Alternatives: "data on asthma were collected" or "information regarding asthma was gathered."
Information about asthma was obtained through the use of a Portuguese version of the questionnaire used by the International Study of Allergy and Asthma in Childhood (ISAAC) [ 35].
The data on allergic asthma was obtained from the questionnaires using the following questions: Does your child have any allergies?" (no/yes), "If yes, does your child have asthma?" (no/yes).
A random sample of 872 adults with asthma was obtained from six General Practices (serving a population of 32,343 listed permanent adult patients) in Sheffield, England during 1998 and 1999.
History of hospitalization for diabetes (ICD-7: 260) and lung disease (ICD-7: 470–527; mostly include upper and lower respiratory tract infections and did not include asthma) was obtained from the National Patient Register.
Other child characteristics (age, presence of siblings, day-care attendance, eczema, allergy, respiratory and non-respiratory tract infections, presence of other conditions or diseases, frequency and severity of asthma symptoms, and prevalence of physician-diagnosed asthma) are obtained via questionnaires at the age of 12, 24, 36 and 48 months, and 6 years.
Data on follow-up visits and organisation of asthma care were obtained by chart review.
Daily self-reports of asthma symptoms were obtained from study diaries and compared with ambient air pollution levels in marginal repeated measures logistic regression models.
By restricting to those who had wheezed on more than one occasion, experienced frequent wheeze or wheezed after the age of 3, more specific asthma definitions were obtained (table 2 and see online supplementary table S1).
Adult (≥ 18 years) self-reported asthma rates (ever) were obtained from the 2002 Behavioral Risk Factor Surveillance System (BRFSS), which was state specific.
Data on country level rates of avoidable hospitalization for CHF, COPD, asthma and diabetes were obtained from the OECD health care quality indicators project.
