Age
Patients under the age of 30 had a higher SCHNOS-C pre-operatively (76.7, compared to 63.9 in over 30s) but also showed a greater post-operative improvement (scoring 25.7 compared to 35) (p<0.001, 95% CI [32.9-69.1]). The over 30s population had a poorer post-operative improvement by comparison (p=0.79, 95% CI [0.0-62.6]). SCHNOS-O improved from 74.5 to 30 (under 30s)(p<0.001, 95% CI [31.3-57.7]) compared to 88.3 to 45.8 (over 30s)(p=0.058, 95% CI [0.0-86.9]) respectively. Figure 4.