Statistical Analysis
Interpretation of data was performed using Prism 8 software (Graphpad, CA, USA). Parametric or nonparametric tests were used as appropriate following normality testing. Patient factors were assessed for correlation with grade of view and complications using Spearman’s correlation of multivariables.
Missing data relating to preoperatively determined patient factors was retrospectively addressed using the Hospital electronic documentation system where possible. Patients who were not questioned about their symptoms in recovery (usually due to exceptionally efficient delivery back to the postoperative ward for same day discharge) were telephoned on the first postoperative day and asked about their symptoms retrospectively – although this potentially introduced recall bias of symptoms, this resulting in no patients being lost to follow-up.