Frontiers in public health
Same ICD-10 code, different estimands: four Polish National Health Fund obesity series, 2015-2025
By Poboży M, Rulkiewicz A, Lisik W and 4 others.
Abstract
Background
Poland's National Health Fund (NFZ) publishes four national series indexed by ICD-10 code E66. Although their labels suggest related measures of obesity, differences in analytical unit, entry rule, look-back period, and temporal structure may alter both the reported level and the apparent response to healthcare-system disruption. We examined whether selecting an official NFZ E66 series materially changes the level, trend, and permissible public-health interpretation of recorded obesity-related activity.
