Table 4.
Comparison among three kidney-size groups of the (post-pre) kidney volume differences and percent differences in the right, left, and total kidney measurements made by two readers. The percent difference was larger when the total kidney volume was smaller
| Kidney | Reader | Small Kidney Group Mean (SD) | Medium Kidney Group Mean (SD) | Large Kidney Group Mean (SD) | P value | Group Pairwise Relationship | |
|---|---|---|---|---|---|---|---|
| Volume difference (post − pre) (mL) | Right | R1 | 20.36 (11.48) | 21.09 (25.58) | 21.03 (17.63) | 0.054 | – |
| R2 | 26.84 (18.54) | 28.06 (21.00) | 20.18 (25.67) | 0.781 | – | ||
| Left | R1 | 16.35 (15.69) | 17.62 (17.63) | −4.17 (21.68) | 0.975 | – | |
| R2 | 23.55 (12.54) | 29.85 (17.15) | 20.60 (15.27) | 0.542 | – | ||
| Total | R1 | 36.70 (22.07) | 38.70 (41.51) | 11.51 (24.52) | 0.204 | – | |
| R2 | 50.39 (28.29) | 57.91 (34.14) | 40.78 (15.92) | 0.523 | – | ||
| Volume %difference [(post − pre) pre]x100 | Right | R1 | 8.26 (4.76) | 4.75 (6.09) | 0.06 (1.72) | 0.011 | Small > Large |
| R2 | 11.61 (8.80) | 5.94 (5.35) | 2.37 (2.18) | 0.030 | Small > Large | ||
| Left | R1 | 8.13 (8.00) | 5.93 (5.35) | 1.36 (1.15) | 0.122 | – | |
| R2 | 11.20 (6.75) | 7.71 (6.50) | 1.83 (1.17) | 0.015 | Small > Large | ||
| Total | R1 | 8.01 (4.90) | 5.07 (5.96) | 2.04 (2.18) | 0.021 | Small > Large | |
| R2 | 11.16 (6.79) | 6.72 (5.66) | 1.92 (0.98) | 0.012 | Small > Large |