Sentences with phrase «estimate potential selection bias»

This study aims: (a) to examine whether poverty predicts changes in behavior problems between 1.5 and 8 years of age; (b) to estimate potential selection bias for the observed associations.

Not exact matches

Although we could not find estimates of fan use in the US population, we examined the potential selection bias by evaluating characteristics associated with SIDS risks in study participants and nonparticipants in a previously published article.16 Using California birth certificate data, we compared the ORs for maternal age, maternal education, parity, birth weight, infant sex, and late initiation of prenatal care (> 5 months» gestation).

Importantly, our null effect estimates from the random experiment differ substantially from those found from an analysis of CPS data, raising concerns about the potential for selection bias in non-experimental estimates of returns.