A cohort study key for the research in PROMISS is LASA - The Longitudinal Aging Study Amsterdam, a cohort consisting of over 3,000 older people aged 55 years and over from the Netherlands.
LASA started in 1991 with the aim to determine physical, emotional, cognitive and social predictors and consequences of ageing, and its data collection is still ongoing.
Based on it, PROMISS is developing and validating a short food questionnaire to screen for low protein intake in community-dwelling older people, the Protein Screener 55+ (Pro55+).
LASA Data on 1348 older men and women (in the age range 56-101 years) were used to develop the Pro55+ and data of 563 older men and women (55-71 years) of the Dutch HEalthy LIfe in an Urban Setting (HELIUS) study were used for external validation.
The screener will be used to include older adult with a low protein intake in the short and long term clinical trials in PROMISS.