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English
Etymology
Formed by analogy with Rx, variant of ℞ (“prescription”), abbreviation of Latin recipe (“take”). Compare also Dx (“diagnosis”).
Noun
Hx (uncountable)
- (medicine) Abbreviation of history.
1987, American Society for Microbiology, Program and abstracts of the Twenty-Seventh Interscience Conference on Antimicrobial Agents and Chemotherapy: 4-7 October 1987, page 171:The purpose of this study was to see if U.u. is more commonly found in children ages 1-12 years with a Hx of sexual contact than those without such a Hx.
2005, Michael L. Perlis, Michael T. Smith, Carla Jungquist, Donn Posner, editors, Cognitive behavioral treatment of insomnia: a session-by-session guide, →ISBN, page 126:Of particular importance is that both sleepiness measures (along with a Hx of OSA) suggest that the patient may be at risk, […]
2010, Carlos Ayala, Brad Spellberg, Boards and Wards, fourth edition, page 553:His Hx of imprisonment and homelessness are risk factors for TB, and his bilateral upper lobe infiltrates are in the appropriate location for reactivation TB.