# Genetic Susceptibility to Childhood Respiratory IIlness in Mexico City

> **NCT00339521** · — · COMPLETED · sponsor: **National Institute of Environmental Health Sciences (NIEHS)** · enrollment: 2362 (actual)

## Conditions studied

- Asthma

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT00339521
- **Lead sponsor:** National Institute of Environmental Health Sciences (NIEHS)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 1999-05-15
- **Primary completion:** 2007-02-12
- **Final completion:** 2020-12-03
- **Target enrollment:** 2362 (ACTUAL)
- **Last updated:** 2020-12-04


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00339521

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00339521, "Genetic Susceptibility to Childhood Respiratory IIlness in Mexico City". Retrieved via AI Analytics 2026-07-28 from https://api.ai-analytics.org/clinical/NCT00339521. Licensed CC0.

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