====== Salt intake (SALT) ======

Salt intake is the name of an [[additional assessments|additional assessment]] which includes additional urine analyses and an additional questionnaire. This additional assessment was implemented in Lifelines at the initiative of the [[https://www.rivm.nl/en|National Institute for Public Health and the Environment (RIVM)]] . The aim of this project was to determine whether the average intake of sodium, potassium, and chloride of Lifelines participants in 2020 has changed compared to 2006-2007 as the result of initiatives and policy changes.\\
Note that the additional urine analyses are linked to the 24-h urine samples collected during the [[3A|third assessment]].
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===== Protocol & response =====
During the first invitation period (October-December 2020), all adult participants who made a [[3a_visit_2|third assessment visit 2]] appointment in November or December 2020 were invited to participate in the salt intake additional assessment. The goal was to include participants from all age groups (18-30, 31-50, and 50+) and both genders. The first invitation period resulted in ~2,900 participants with additional urine analyses. After this first period, the additional assessment came to a stop due to COVID-19. During the second invitation period ([[3a_visit_2|third assessment visit 2]] appointment in April-May 2021) ~4,000 additional participants were included (total ~6,900).

All adult participants meeting the inclusion criteria above, were also invited to participate in an additional questionnaire. Resulting in ~8,300 invites with a response of ~4,500 completed questionnaires (54%).

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===== Publication using salt intake data =====
  * Dinnissen and Hendriksen (2022). Zout- en kaliuminname in 2020/2021 en trend in inname voor volwassenen in  Noord Nederland ({{ ::zout-_en_kaliuminname_in_2020-2021_en_trend_in_inname_voor_volwassenen_in_noord_nederland.pdf |Report RIVM}}).
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===== Variables =====
The additional urine analyses can be found in the subsection [[urine_analyses|Biospecimen: Urine]] (3 items), while the questionnaire variables can be found in the subsection [[Salt intake]] (55 items).