Ancestry-environment interactions and asthma risk among Puerto Ricans

Shweta Choudhry, Esteban González Burchard*, Luisa N. Borrell, Hua Tang, Ivan Gomez, Mariam Naqvi, Sylvette Nazario, Alphonso Torres, Jesus Casal, Juan Carlos Martinez-Cruzado, Elad Ziv, Pedro C. Avila, William Rodriguez-Cintron, Neil J. Risch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Scopus citations


Background: Puerto Ricans, an admixed population of African, European, and Native American ancestries, have the highest asthma prevalence, morbidity, and mortality rates of any United States' population. Although socioeconomic status (SES) is negatively correlated with asthma incidence in most populations, nosuch relationship has been identified among Puerto Ricans. We hypothesized that, in this admixed population, the association between SES and asthma may interact with genetic ancestry. Methods: We analyzed 135 Puerto Rican subjects with asthma and 156 control subjects recruited from six different recruitment centers in Puerto Rico. Individual ancestry for each subject was estimated using 44 ancestry informative markers. SES was assigned using the census tracts' median family income. Analyses of SES were based on the SES of the clinic site from which the subjects were recruited and on a subset of individuals on whom home address-based SES was available. Results: In the two (independent) analyses, we found a significant interaction between SES, ancestry, and asthma disease status. At lower SES, European ancestry was associated with increased risk of asthma, whereas African ancestry was associated with decreased risk. The opposite was true for their higher SES counterparts. Conclusions: The observed interaction may help to explain the unique pattern of risk for asthma in Puerto Ricans and the lack of association with SES observed in previous studies when not accounting for varying proportions of ancestry.

Original languageEnglish (US)
Pages (from-to)1088-1093
Number of pages6
JournalAmerican journal of respiratory and critical care medicine
Issue number10
StatePublished - Nov 15 2006


  • Admixture
  • Asthma
  • Gene-environment
  • Latino
  • Socioeconomic status

ASJC Scopus subject areas

  • Critical Care and Intensive Care Medicine
  • Pulmonary and Respiratory Medicine


Dive into the research topics of 'Ancestry-environment interactions and asthma risk among Puerto Ricans'. Together they form a unique fingerprint.

Cite this