Examlex
A common source of spurious correlation between X and Y is when a third unspecified variable Z affects both X and Y.
Smoking Status
An individual's current use of tobacco products, often categorized as current smoker, former smoker, or never smoker.
Menopause
The natural cessation of menstruation that typically occurs in women in their late 40s to early 50s, marking the end of reproductive years.
Menstrual Pad
A type of feminine hygiene product worn externally to absorb menstrual flow.
Sexual Intercourse
The physical act between individuals that typically involves the penetration of the body, considered a fundamental aspect of human sexuality and reproduction.
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