Kakwani index: measure of the extent to which health care finance or delivery departs from proportionality, measured by the Gini coefficient and concentration coefficient (finance) and concentration indices for delivery. wskaźnik Kakwaniego

Kaldor-Hicks criterion: cf. compensation test.

Kaplan-Meier estimator (product-limit estimator): procedure for estimating the survivor function from a set of data that includes censored observations. estymator Kaplana-Meiera (granicznego iloczynu)

Keeler-Cretin paradox: argument that if one discounts health outcomes at a lower rate than costs in CEA, the resulting C/E ratio can be successively improved (lowered) by successively delaying the start of the candidate intervention; this infinite regress can be avoided by discounting health outcomes and costs at the same rate. paradoks Keelera-Cretina

Key contributor plan: performance-based incentive programme created for the purpose of attracting, motivating and keeping key individuals or small groups. program motywacyjny

Key informant: member of a culture or group studied who systematically shares his/her knowledge with the researcher; the person usually has expert knowledge of its rules, customs and language. kluczowy informator

Kickback: secret payment made in order to obtain business; cf. bribe. łapówka

Kind (type) of care: either preventive (primary and secondary prevention), curative, rehabilitative or promotional health care services. rodzaj opieki zdrowotnej

Kinetic energy: energy possessed by a moving body of matter, such as water, as a result of its motion. energia kinetyczna

Kinked demand curve: demand curve faced by an oligopolist based on the assumption that competitors will match a decrease but not an increase in the price of the product.