CKD Stage 4 to 5 (n = 89) | HD (n = 75) | Sleep-SCORE Controls (n = 224) | |
---|---|---|---|

AHI ≥ 30 | ϕ = 0.13, P = 0.23 | ϕ = 0.32, P = 0.009^{b} | ϕ = 0.09, P = 0.19 |

Nocturnal hypoxemia ≥ 3% TST | ϕ = 0.16, P = 0.18 | ϕ = 0.08, P = 0.54 | ϕ = 0.13, P = 0.07 |

Obstructive apnea index | r_{pb} = 0.12, P = 0.29 | r_{pb} = 0.27, P = 0.02^{a} | r_{pb} = 0.14, P = 0.03^{a} |

Central apnea index | r_{pb} = 0.12, P = 0.27 | r_{pb} = 0.18, P = 0.13 | r_{pb} = 0.07, P = 0.28 |

Mixed apnea index | r_{pb} = 0.06, P = 0.56 | r_{pb} = 0.25, P = 0.03^{a} | r_{pb} = 0.09, P = 0.18 |

Results are expressed as correlation coefficient (ϕ) or

*r*point biserial (*r*_{pb}) and two-tailed statistical significance (*P*). Nocturnal hypoxemia ≥ 3% TST, percentage ≥3% of total sleep time with oxyhemoglobin saturation <90%.↵Significance at the

^{a}0.05 and^{b}0.01 level.