Table 4:
Univariate and multivariable logistic regression for risk of IDH per 4°C decrease in four seasons (≤27°C).
| Sessions with temperature ≤27°C (n = 62 234) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Unadjusted | Adjusteda | ||||||||
| Definition | Spring (n = 18 781) | Summer (n = 3565) | Autumn (n = 14 362) | Winter (n = 25 526) | Spring (n = 17 372)b | Summer (n = 3271)b | Autumn (n = 13 383)b | Winter (n = 23 259)b | |
| Fall40 | OR | 1.278 | 1.260 | 1.415 | 1.189 | 1.267 | 0.863 | 1.368 | 1.227 |
| 95% CI | 1.196–1.366 | 0.753–2.108 | 1.232–1.625 | 1.119–1.264 | 1.167–1.375 | 0.440–1.694 | 1.176–1.591 | 1.136–1.325 | |
| P-value | <.001 | .38 | <.001 | <.001 | <.001 | .67 | <.001 | <.001 | |
| P interaction c | .343 | .728 | |||||||
| Nadir90/100 | OR | 1.136 | 0.884 | 1.158 | 1.110 | 1.251 | 0.886 | 1.207 | 1.182 |
| 95% CI | 1.050–1.229 | 0.510–1.533 | 1.006–1.333 | 1.047–1.177 | 1.134–1.381 | 0.409–1.919 | 1.010–1.443 | 1.093–1.277 | |
| P-value | .002 | .66 | .041 | <.001 | <.001 | .76 | .038 | <.001 | |
| P interaction c | .134 | .029 | |||||||
a
Adjusted for age, sex, diabetes, coronary artery disease, Charlson Comorbidity Index, hemodialysis vintage, UF/DW, pre-HD SBP, blood flow, dialysate flow, dialysate average temperature, conductivity, dialysate calcium, hemoglobin, antihypertensive medications and iron infusion.
b
The number is reduced because of missing data.
c
Interaction for season and ambient temperature.