Mean lengths of suture material incorporated into loop holding hooks in test bed, for each type of knot method
| Method of formation of square reef knot | Total no of knots formed | Mean length of suture material incorporated into loop held by knot mm | 95% lower CI of mean | 95% upper CI of mean |
| Flat reef knot | 120 | 25.1 | 24.2 | 26.0 |
| No hand-crossing knot | 120 | 16.3 | 15.9 | 16.7 |
| Knot tied under tension | 120 | 17.0 | 16.3 | 17.7 |
Results in bold are significantly different.