(HealthDay News) – In utero smoke exposure is associated with poor asthma control and early-onset asthma in children assessed at 8–17 years of age.

Sam S. Oh, PhD, MPH, from the University of California in San Francisco, and colleagues performed a case-only analysis of 2,481 Latino and black subjects with asthma (ages 8–17 years).

The researchers found that poor asthma control among children was independently associated with in utero smoking (odds ratio [OR], 1.5; 95% confidence interval [CI], 1.1–2.0). Secondary asthma outcomes, including early-onset asthma (OR, 1.7; 95% CI, 1.1–2.4), daytime symptoms (OR, 1.6; 95% CI, 1.1–2.1), and asthma-related limitation of activities (OR, 1.6; 95% CI, 1.2–2.2) were all associated with in utero smoking.

“Maternal smoking while in utero is associated with poor asthma control in black and Latino subjects assessed at 8–17 years of age,” the authors write.

Several authors disclosed financial ties to the pharmaceutical industry.

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