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The dependency ratio is an age-population ratio of those typically not in the labor force (the dependent part ages 0 to 14 and 65+) and those typically...

human sex ratio is the ratio of males to females in a population in the context of anthropology and demography. In humans, the natural sex ratio at birth...

2024, the global sex ratio at birth is estimated at 107 boys to 100 girls (1,000 boys per 934 girls). By old age, the sex ratio reverses, with 81 older...

This is a list of countries by age at first marriage. The list is current from contemporary surveys. It does not treat the topic in history. Currency...

odds ratio (OR) is a statistic that quantifies the strength of the association between two events, A and B. The odds ratio is defined as the ratio of the...

The potential support ratio (PSR) is the number of people age 15–64 per one older person aged 65 or older. This ratio describes the burden placed on the...

In mathematics, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities. Expressed...

The waist–hip ratio or waist-to-hip ratio (WHR) is the dimensionless ratio of the circumference of the waist to that of the hips. This is calculated as...

The digit ratio is the ratio taken of the lengths of different digits or fingers on a hand. The most commonly studied digit ratio is that of the 2nd (index...

Sex ratio is used to describe the ratio of females to males in a population. In India, the sex ratio has been estimated via a number of methods and data...

of the ratio. It has been shown that the degree of inversion of this ratio in individuals on antiretroviral therapy is indicative of the age of the infection...

The child sex ratio in India is defined as the number of females per thousand males in the age group 0–6 years in a human population. Thus it is equal...

original post. Twitter users may "initiate" a ratio by replying or quote retweeting a tweet with the text "ratio" in the hopes that their tweet acquires more...

Dependency ratios are a measure of the age structure of a population. They indicate the proportion of individuals that are likely to be economically "dependent"...

Ratio decidendi (US: /ˌreɪʃioʊ ˌdɪsaɪˈdɛndi, -daɪ/; Latin plural rationes decidendi) is a Latin phrase meaning "the reason" or "the rationale for the...

A person's waist-to-height ratio – occasionally written WHtR – or called waist-to-stature ratio (WSR), is defined as their waist circumference divided...

An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and...

Stroke ratio, today universally defined as bore/stroke ratio, is a term to describe the ratio between cylinder bore diameter and piston stroke length in...

supergolden ratio is a geometrical proportion close to 85/58. Its true value is the real solution of the equation x3 = x2 + 1. The name supergolden ratio results...

The FEV1/FVC ratio, also called modified Tiffeneau-Pinelli index, is a calculated ratio used in the diagnosis of obstructive and restrictive lung disease...