TABLE 1.

Summary of Results

KidneysNonalignedAligned
Number9897
Mean length ± 1 SD (mm)
 Observer 178.4 ± 15.083.7 ± 15.3
 Observer 280.4 ± 15.283.6 ± 15.6
Interobserver correlation0.950.97
Mean interobserver variability ± 1 SD (mm)3.62.8
Mean interobserver difference ± 1 SD (mm)2.0 ± 4.8−0.1 ± 4.0