Two modeling approaches are commonly used to estimate the associations between
neighborhood characteristics and individual-level health outcomes in multilevel studies (subjects …

Background In low- and middle-income countries, scaling essential health interventions to
achieve health development targets is constrained by the lack of skilled health professionals …

OBJECTIVE: To estimate the shortage of mental health professionals in low- and middle-income
countries (LMICs). METHODS: We used data from the World Health Organization's …

BACKGROUND: The human secondary sex ratio reportedly falls in populations subjected to
exogenous stressors such as earthquakes or political and social upheavals. Explanations of …

OBJECTIVE: The objective of the study was to examine among term pregnancies whether the
risk of perinatal complications increases with increasing gestational age. STUDY DESIGN: …

Background The secondary sex ratio (ie, the odds of a male birth) reportedly declines following
natural disasters, pollution events, and economic collapse. It remains unclear whether …

BACKGROUND We examined pregnancy outcomes in New York City (NYC) and upstate
New York after the September 11, 2001 World Trade Center disaster. METHODS Using birth …

Background Although studies have demonstrated that air pollution is associated with exacerbation
of asthma symptoms in children with asthma, little is known about the susceptibility of …

BACKGROUND: Natural and man-made disasters as well as declining economies appear to
coincide with reduced odds of male live births among humans (ie lower secondary sex ratio)…

Background The ratio of male to female live births (ie the sex ratio) reportedly falls when
populations suffer rare and extreme ambient stressors such as the collapse of national …