Tag: Demography

According to the Office for National Statistics, the central rate of mortality, known as $m_x$, is fundamental for calculating national life tables. **What is the central death rate**, and how does this sophisticated demographic tool provide critical insights into a population's health?

On average, about 105 boys are born for every 100 girls globally, establishing males as the gender most likely to be born. This slight male bias at birth, known as the sex ratio at birth (SRB), is a consistent demographic observation, but the reasons behind it are complex and involve an interplay of biological and environmental factors. The imbalance is temporary, as higher male mortality rates tend to equalize the population ratio over the lifespan.

The term “O’Sullivan method” can refer to at least three distinct concepts across different fields, which can lead to confusion. From a critical screening test during pregnancy to a life-saving medical procedure, understanding which method is being referenced is crucial for accurate health information. This guide clarifies the different applications and contexts of the O’Sullivan method.

According to the Centers for Disease Control and Prevention (CDC), February consistently ranks as the month with the fewest births in the United States, a trend observed for decades. This phenomenon prompts the question: What month has the least babies and what causes this seasonal lull?