Frequent ear infections in infancy and the risk of asthma in Mexican American children.

Objectives: This study examined the associations of history of ear infections in infancy with doctor-diagnosed asthma in a large sample of Mexican American children.

Methods: In this population-based cross-sectional study, parents of 2023 children completed a questionnaire that collected data on doctor-diagnosed asthma, doctor-diagnosed ear infections, as well as antibiotics use in infancy, and other potential confounding variables.

Results: Children with a history of ear infections in infancy were more likely to have asthma compared with those who had no history of ear infections in infancy; the adjusted odds ratios (ORs) were 2.

Associations of doctor-diagnosed asthma with immigration status, age at immigration, and length of residence in the United States in a sample of Mexican American School Children in Chicago.

Objectives: Among Mexican Americans in the United States, children who were born in the US had higher rates of asthma than their Mexico-born peers. The purpose of this study was to examine the associations of doctor-diagnosed asthma with immigration-related variables and to investigate whether these associations could be explained by factors that may change with migration.

Methods: We surveyed parents of 2,023 school children of Mexican descent and examined the associations of asthma with nativity, age at immigration, and length of residence in the US after adjusting for potential confounding variables.

Duration of illness is an important variable for untreated children with juvenile dermatomyositis.

Objective: To evaluate the impact of duration of untreated symptoms in children with juvenile dermatomyositis (JDM) on clinical and laboratory status at diagnosis.

Study Design: We examined physical and laboratory data from the first physician visit for 166 untreated children with JDM. Disease activity scores (DASs) assessed skin and muscle involvement.