Watanabe K, Sakamaki K, Nishii T, Yamamoto T, Maehara T, Nakayama H, Masuda M. Gender Differences in the Recurrence Timing of Patients Undergoing Resection for Non-Small Cell Lung Cancer.
Asian Pac J Cancer Prev 2018;
19:719-724. [PMID:
29582626 PMCID:
PMC5980847 DOI:
10.22034/apjcp.2018.19.3.719]
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Abstract
Objective:
This study was designed to visually represent postoperative recurrence patterns using event dynamics and to assess sex-based differences in the timing of recurrence for non-small cell lung cancer.
Methods:
We studied 829 patients (538 men, 291 women) with NSCLC who underwent complete pulmonary resection in 9 hospitals. Event dynamics with the use of life-table methods were evaluated, and only first events (distant metastases or local recurrence) were considered. The effects of sex, histological type, pathological stage, and smoking history were studied.
Result:
The resulting smoothed hazard rate curves indicated that the recurrence risk pattern definitely correlated with sex, with a sharp peak in the first year in men and a broad peak during the first 2 to 3 years in women. These findings were also confirmed by analyses according to pathological stage, histological type, and smoking history.
Conclusion:
The peak times of recurrence differed considerably between men and women. The delayed time of peak recurrence in women, associated with a longer disease-free interval within subsets of patients with similar disease stage, histological type, and smoking status, might account for the better survival in women.
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