Factors affecting replies.

Background
Spontaneous pneumothorax (SP) is a frequently encountered respiratory condition. Despite advancements in treatment techniques, there is currently no standardized treatment protocol. The aim of this study was to standardize the management of SP by collecting long-term postoperative data through written surveys.
Methods
Our study included 673 surgeries performed for SP at our institution between January 2011 and December 2019. We administered written surveys via mail to gather data on post-surgery recurrence rates and other related factors. The survey addressed key symptoms, medical consultations, and specific diagnoses of SP after surgery.
Results
The effective response rate was 70.7%, with significant differences observed across age groups. Among teenagers, the recurrence rate peaked three years postoperatively, with an ipsilateral recurrence rate of 4.8% and a contralateral incidence rate of 11.8%, both of which were significantly higher than those in other age groups. Additionally, age, sex, postoperative contralateral pneumothorax, and the period before the survey were identified as factors influencing the survey results.
Conclusion
This survey highlighted the need for long-term postoperative follow-up for teenagers. While written surveys have limitations, this study provided valuable data for understanding the outcomes of SP. Moving forward, it is advisable to conduct surveys using other effective tools or to continue follow-ups in outpatient clinics.