Symptom-to-Diagnosis Interval, Treating-Center Context, and Survival in Nasopharyngeal Carcinoma in Nonendemic Northern China: A Multicenter Real-World Cohort Study.
prospective_cohort · Level II
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- Record sourced from PubMed, PMID 42657960.
- Also identified by DOI 10.1002/hed.70449.
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Abstract
In nonendemic northern China, symptom recognition prompts diagnostic evaluation for nasopharyngeal carcinoma. We analyzed 1022 patients with nonmetastatic nasopharyngeal carcinoma treated with definitive-intent intensity-modulated radiotherapy. The symptom-to-diagnosis interval extended from first symptom onset to pathological diagnosis. Logistic and Cox models assessed stage and survival; treating-center analyses used a 2016-2022 common-window cohort. Stages III-IVA disease occurred in 807 patients (79.0%), and 576 (56.4%) had intervals > 3 months. Intervals > 3 months were associated with Stages III-IVA disease (OR 2.52, 95% CI 1.85-3.45) and mortality (HR 1.62, 95% CI 1.28-2.06); after AJCC-stage adjustment, HR 1.29 (95% CI 1.00-1.67). Treatment at participating tertiary general hospitals was associated with higher mortality (HR 1.46, 95% CI 1.07-1.98). Exploratory model-standardized analyses yielded predicted 5-year death differences of 25.99 (4.22-47.68) and 51.47 (26.27-75.50) for treating-center and interval scenarios. Longer intervals were associated with advanced stage and poorer survival; survival differed by treating-center context.