The vanishing advantage of longevity in Nicoya, Costa Rica: A cohort shift

BACKGROUND The Nicoya region in Costa Rica has been identified as one of a handful of hotspots of extreme longevity. The evidence supporting this status comes mostly from observing the 1990 and 2000 decades and cohorts born before 1930. OBJECTIVE To determine how the longevity advantage of older men in Nicoya has progressed in the period 1990 to 2020 and in cohorts born from 1900 to 1950. METHODS Remaining length of life and adult mortality were estimated using new public administrative records from the electoral system and a Gompertz regression model. A new nationwide survival-time database of 550,000 adult Costa Ricans who were alive at any point during 1990–2020 was put together.