Table 1.

Bland-Altman agreement statistics for differences in follicle counts made by ultrasound biomicroscopy (UBM) and histology (HIS)

Follicle size	Mean UBM counts	Mean HIS counts	Bias	95% CI for bias	95% Limits of agreement
200–299 μm	3.4	7.4	4.0	−5.3 to −2.7	−12.8 to 4.9
300–399 μm	5.2	6.0	−0.8	−2.0 to 0.3	−8.5 to 6.8
400–499 μm	1.7	0.9	0.8	0.4 to 1.3	−2.4 to 4.1
≥500 μm	0.1	0.1	0.0	–	–
All sizes	10.4	14.4	−4.0	−4.9 to −3.1	−10.5 to 2.5