Prognostic Factors Analysis and Nomogram Construction of Dual Primary Lung Cancer: A Population Study

Figure 2

Prognostic nomogram of overall survival in DPLC patients. Nomogram to predict 3- and 5-year OS rates of DPLC patients. The factors of age, sex, race, grade, primary site, histologic type, stage, LN metastasis and surgery were included in the model. Histological type: “Aden-aden” = both first and second primary lung cancer are adenocarcinomas; “Squa-squa” = both first and second primary lung cancer are squamous cell carcinomas; “Squa-aden” = FPLC is squamous cell carcinoma and SPLC is adenocarcinoma; “Aden-squa” = FPLC is adenocarcinoma and SPLC is squamous cell carcinoma; “BAC-aden” = FPLC is bronchioloalveolar cancer and SPLC is adenocarcinoma; Surgery: “Yes-yes” = patients received corresponding treatment for both first and second primary lung cancer; “Yes-no” = patients received corresponding treatment for FPLC and not for SPLC; “No-yes” = patients received corresponding treatment for SPLC and not for FPLC; “No-no” = patients did not received corresponding treatment for first and second primary lung cancer.