Table 3.
Univariate linear regression of the 13 continuous variables and log maxminhauc and log maxminhrp – cohorts 1 and 2
| log maxminhauc – cohort 1 | log maxminhauc – cohort 2 | log maxminhrp – cohort 1 | log maxminhrp – cohort 2 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variable | Beta | SE | t | P > | Beta | SE | t | P > | Beta | SE | t | P > | Beta | SE | t | P > |
| LKTBR | −0.42 | 0.06 | −6.91 | <0.01 | −0.17 | 0.04 | −4.64 | <0.01 | −0.36 | 0.06 | −6.40 | <0.01 | −0.16 | 0.04 | −4.63 | <0.01 |
| RKTBR | −0.36 | 0.08 | −4.55 | <0.01 | −0.27 | 0.05 | −5.40 | <0.01 | −0.39 | 0.08 | −4.92 | <0.01 | −0.26 | 0.05 | −5.10 | <0.01 |
| Time visualisation left calyces | 0.09 | 0.05 | 1.83 | 0.07 | 0.01 | 0.04 | 0.11 | 0.91 | 0.10 | 0.04 | 2.39 | 0.02 | <−0.01 | 0.04 | −0.03 | 0.98 |
| Left background area | −0.08 | 0.02 | −3.44 | <0.01 | −0.08 | 0.02 | −3.82 | <0.01 | −0.06 | 0.02 | −2.74 | 0.01 | −0.08 | 0.02 | −3.57 | <0.01 |
| Right background area | −0.04 | 0.03 | −1.28 | 0.20 | −0.07 | 0.02 | −4.11 | <0.01 | −0.03 | 0.03 | −1.07 | 0.29 | −0.08 | 0.02 | −4.38 | <0.01 |
| Time visualisation left pelvis | 0.04 | 0.02 | 2.11 | 0.04 | −0.01 | 0.01 | −0.75 | 0.46 | 0.03 | 0.17 | 1.90 | 0.06 | −0.01 | 0.01 | −1.25 | 0.21 |
| Time visualisation right calyces | 0.03 | 0.02 | 1.70 | 0.09 | 0.03 | 0.01 | 3.65 | <0.01 | 0.03 | 0.02 | 1.49 | 0.14 | 0.03 | 0.01 | 4.02 | <0.01 |
| Left renal area | −0.01 | 0.01 | −2.48 | 0.01 | −0.01 | <0.01 | −3.68 | <0.01 | −0.01 | 0.01 | −2.30 | 0.02 | −0.01 | <0.01 | −3.80 | <0.01 |
| Time visualisation right pelvis | 0.01 | 0.01 | 1.05 | 0.30 | 0.01 | 0.01 | 1.29 | 0.20 | 0.01 | 0.01 | 1.17 | 0.25 | 0.01 | 0.01 | 0.84 | 0.40 |
| GFR | −0.01 | 0.02 | −5.39 | <0.01 | <−0.01 | <0.01 | −2.81 | 0.01 | −0.01 | 0.02 | −4.36 | <0.01 | <−0.01 | <0.01 | −2.94 | <0.01 |
| Right renal area | −0.01 | 0.01 | −1.78 | 0.08 | −0.01 | <0.01 | −3.89 | <0.01 | −0.01 | 0.01 | −1.17 | 0.25 | −0.01 | <0.01 | −4.27 | <0.01 |
| Age | −0.01 | <0.01 | −3.57 | <0.01 | <−0.01 | <0.01 | −4.71 | <0.01 | <−0.01 | <0.01 | −3.00 | <0.01 | <−0.01 | <0.01 | −4.62 | <0.01 |
| Asymmetry drf | <0.01 | <0.01 | 0.43 | 0.67 | <−0.01 | 0.002 | −1.20 | 0.23 | <0.01 | <0.01 | 0.67 | 0.51 | <−0.01 | <0.01 | −0.51 | 0.61 |
Listed in ascending order of the P value of the beta-coefficient of cohort 1. The variables for which P were ≤2 or >0.2 for all are in bold. A negative beta-coefficient predicted good reproducibility and a positive beta-coefficient predicted decreased reproducibility.
DRF, differential renal function; GFR, glomerular filtration rate LKTBR, left kidney to background ratio; RKTBR, right kidney to background ratio.