Background: This study aims to identify the prognostic factorsfor stage I lung adenocarcinoma and to evaluate the surgicalmanagement of subsolid nodules.Methods: The study included 133 patients (90 males, 43 females;mean age 64.9 years; range, 29 to 82 years) who had undergoneoperation in our clinic for stage I lung adenocarcinoma betweenJanuary 2007 and December 2015. Clinical, radiological andpathological data were retrospectively evaluated and their effectson recurrence and survival were examined by Kaplan-Meier andCox regression analyses.Results: Comparing the histopathological tumor types accordingto the pathological tumors size, we determined that the prevalenceof invasive adenocarcinoma significantly increased with increasingtumor size (p<0.001). For all nodules, a tumor disappearance ratelower than 25% negatively influenced disease-free survival and amaximum standardized uptake value higher than 5.6 negativelyinfluenced overall survival (p=0.027 for both). The grouping,which was performed considering the maximum standardizeduptake value 5.6 as the cut-off value, was an independent prognosticfactor for overall survival (hazard ratio: 5.973, 95% confidenceinterval: 1.186-30.073, p=0.03). Five-year overall survival rate wasstatistically significantly higher in patients who underwent wedgeresection or segmentectomy for subsolid nodules compared tothose who underwent lobectomy (100% vs. 79.3%, p=0.044).Conclusion: Sublobar resections can be safely performed in subsolidnodules smaller than 2 cm in diameter with tumor disappearance rate≥25% and maximum standardized uptake value ≤5.6.