highly significantP = .001
The correlation coefficient ( r ) between the MSHQ score of the CKVU group before and after surgery showed a statistically significant difference ( r = 0.1435, P = .041), and in the TLU group, it showed a statistically highly significant difference ( r = 0.3692, P = .001) as shown in (File 1, Supplemental Digital Content, http://links.lww.com/MD/H99 ), Figs. 1 and 2 , respectively. 4.