Statistical analyses
Data were transferred to MS Excel (Microsoft, USA) and analyzed using SPSS version 22.0 (IBM Corp, Armonk, NY). Measurements are expressed as means±standard deviations (SDs).
The changes in nasal tip projection ratio, nasolabial angle, tip location ratio, and nasal length ratio before and after surgery were measured. Results were analyzed using the paired t -test and Wilcoxon’s signed rank test.
Statistical significance was accepted for p -values of < 0.05. The statistical validity of this study was certified and reviewed and proofread by statisticians at the department of statistics in a national university.