Table 3.

Comparison of intraobserver length measurements

Intraobserver	18 μm fibers	50 μm fibers
Observer 1	P = 0.540	P = 0.628
Observer 2	P = 0.133	P = 0.797
Observer 3	P = 0.972	P = 0.758

P values from paired t tests comparing each observer's first and second repeated measurement for each microfiber set.