tertile

English

Alternative forms

Etymology

By surface analysis, tert- +‎ -ile.

Noun

tertile (plural tertiles)

  1. (statistics) Either of the two points that divide an ordered distribution into three parts, each containing a third of the population.
  2. (statistics) Any one of the three groups so divided.
    The first tertile results include January through April's revenues.
    • 2004 September 3, Salim Yusuf, Steven Hawken, Stephanie Ôunpuu, et al., “Effect of potentially modifiable risk factors associated with myocardial infarction in 52 countries (the INTERHEART study): case-control study”, in The Lancet‎[1], archived from the original on 30 June 2022, page 937:
      Smoking (odds ratio 2·87 for current vs never, PAR 35·7% for current and former vs never), raised ApoB/ApoA1 ratio (3·25 for top vs lowest quintile, PAR 49·2% for top four quintiles vs lowest quintile), history of hypertension (1·91, PAR 17·9%), diabetes (2·37, PAR 9·9%), abdominal obesity (1·12 for top vs lowest tertile and 1·62 for middle vs lowest tertile, PAR 20·1% for top two tertiles vs lowest tertile), psychosocial factors (2·67, PAR 32·5%), daily consumption of fruits and vegetables (0·70, PAR 13·7% for lack of daily consumption), regular alcohol consumption (0·91, PAR 6·7%), and regular physical activity (0·86, PAR 12·2%), were all significantly related to acute myocardial infarction (p<0·0001 for all risk factors and p=0·03 for alcohol).
    • 2019 March 8, Blake Murphy, “How the Raptors have fared against elite opponents this season”, in The New York Times‎[2], archived from the original on 3 January 2026:
      To determine whether that’s been the case, I broke the league into tertiles at both ends of the floor and overall.
    • 2025 July 8, Jamin Brahmbhatt, “The testosterone trap: Why your problem might not be ‘low T’”, in CNN‎[3], archived from the original on 16 July 2025:
      When we start testosterone therapy, the goal is typically to raise testosterone levels into the range of about 450 to 600 ng/dL, which is considered the “middle tertile” for most laboratory reference ranges.

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