Key result
A 68-indicator quality control system achieves ~96% overall compliance and narrows regional disparities.
A newly developed 68-indicator quality control system for nutrition and chronic disease surveillance in China demonstrated high compliance and helped identify and narrow regional disparities.
High compliance bolsters sentinel surveillance data quality; leaves open whether it narrows outcome disparities or warrants wider adoption.
What is already known about this topic?: The National Health Commission established a sentinel surveillance project for major nutrition and chronic disease issues in 2022, with a four-tiered full-process quality control (QC) system, monitoring Healthy China Action 2030 indicators. What is added by this report?: A 68-indicator QC system was developed through two Delphi expert consultation rounds. Application across 38 surveillance sites (2023-2025) showed 95.67% (2,472/2,584) overall compliance. Physical measurement was the weakest dimension. Regional disparities narrowed after targeted interventions. What are the implications for public health practice?: This system identifies surveillance weaknesses, guides targeted improvements, and provides a replicable reference for QC in other population-based surveillance programs.
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Xia et al. (2026) studied Major nutrition and chronic disease issues (n=2,584). 68-indicator quality control (QC) system was evaluated on overall compliance. Application of a 68-indicator quality control system across 38 surveillance sites achieved 95.67% (2,472/2,584) overall compliance, with regional disparities narrowing after targeted interventions.
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