Table 6.
Multiple linear regression results for the 594 combinations analysed for log maxminhauc in cohorts 1 and 2
| Variable (n) | P range cohort 1 | P value ≤0.05 cohort 1 | % combinations cohort 1 | P range cohort 2 | P value ≤0.05 cohort 2 | % combinations cohort 2 |
|---|---|---|---|---|---|---|
| Age (594) | <0.001–0.461 | 329 | 55 | 0.004–0.160 | 475 | 80 |
| GFR (594) | <0.001–0.007 | 594 | 100 | 0.046–0.416 | 3 | 1 |
| LKTBR (297) | <0.001–0.005 | 297 | 100 | <0.001–0.023 | 297 | 100 |
| RKTBR (297) | <0.001–0.093 | 261 | 88 | <0.001–0.009 | 297 | 100 |
| Left renal area (198) | 0.198–0.999 | 0 | 0 | 0.587–0.999 | 0 | 0 |
| Right renal area (198) | 0.004–0.998 | 86 | 43 | 0.092–0.992 | 0 | 0 |
| Left background area (198) | 0.332–0.991 | 0 | 0 | 0.576–0.999 | 0 | 0 |
| Left no cortical defects (198) | 0.003–0.428 | 59 | 30 | 0.256–0.997 | 0 | 0 |
| Right no cortical defects (198) | 0.086–0.998 | 0 | 0 | 0.034–0.998 | 8 | 4 |
| Left <2 cortical defects (198) | 0.036–0.995 | 3 | 2 | 0.341–0.993 | 0 | 0 |
| Left renal margins smooth (54) | 0.001–0.495 | 18 | 33 | 0.614–0.929 | 0 | 0 |
| Right renal margins smooth (54) | 0.135–0.530 | 0 | 0 | 0.187–0.994 | 0 | 0 |
| Both renal margins smooth (54) | 0.132–0.999 | 0 | 0 | 0.283–0.725 | 0 | 0 |
| Left renal margins irregular (54) | 0.003–0.719 | 17 | 31 | 0.614–0.929 | 0 | 0 |
| Right renal margins irregular (54) | 0.181–0.889 | 0 | 0 | 0.187–0.944 | 0 | 0 |
| Both renal margins irregular (54) | 0.006–0.218 | 36 | 67 | 0.023–0.123 | 15 | 28 |
| Left renal margins well defined (54) | <0.001–0.613 | 27 | 50 | 0.443–0.998 | 0 | 0 |
| Right renal margins well defined (54) | <0.001–0.433 | 27 | 50 | <0.001–0.093 | 48 | 89 |
| Both renal margins well defined (54) | <0.001–0.021 | 54 | 100 | 0.087–0.555 | 0 | 0 |
| Time visualisation left calyces (198) | 0.002–0.839 | 77 | 39 | 0.107–0.347 | 0 | 0 |
| Time visualisation right calyces (198) | 0.003–0.775 | 99 | 50 | <0.001–0.235 | 180 | 91 |
| time visualisation left pelvis (198) | 0.001–0.762 | 59 | 30 | 0.042–0.117 | 18 | 9 |
The number of combinations in which each variable was included is given in brackets. The range of P values and the number of times a variable had a P value ≤0.05 is also listed. The variables with the same number of combinations in cohorts 1 and 2 in which the P value of the beta coefficient was ≤0.05 or >0.05 are presented in bold. The percentage of combinations in which each variable was significant is also given.