Table 3 Spearman’s correlation between surgical movements and changes of the upper philtrum center (UPC), lower philtrum center (LPC), and lower lip center (LLC)

Angular change of UPC

p

NS

NS

NS

r

0.156

0.288

0.038

Linear change of UPC

p

NS

0.006

NS

r

0.216

− 0.226

0.223

Angular change of LPC

p

NS

0.038

NS

r

0.215

0.280

0.016

Linear change of LPC

p

NS

0.046

NS

r

0.210

0.266

0.023

Angular change of LLC

p

NS

0.001

0.046

r

0.258

0.484

− 0.267

Linear change of LLC

p

NS

NS

NS

r

0.009

0.007

0.008