i-base

Q

QD (or qd)

QD (or qd) – a short hand term for medication dosing that means ‘once-daily’. See also q24H.

Q12H

Q12H (or q12H) – an abbreviated term for timing medication doses. q8H means every 8 hours.This is not the same as three times a day (tid or TD). q12H means every 12 hours. This is not the same as twice-daily …

quantitative (in a study)

quantitative (in a study) – where what is being measured has a numerical value or fits a pre-defined scale or range of responses.

qualitative (in a study)

qualitative (in a study) – where what is being measured either fits one of several categories, or includes descriptive results.