Background and Objective. To determine the diagnostic yield of nocturnal oximetry versus polygraphy for the diagnosis and classification of sleep apnea hypopnea syndrome (SAHS). Methods. Prospective study conducted in a university hospital. Subjects with a clinical suspicion of SAHS were included. All of them underwent home polygraphy and oximetry on the same night. A correlation was made between the apnea-hypopnea index (AHI) and the oximetry variables. The variable with the highest diagnostic value was calculated using the area under the curve (AUC), and the best cut-off point for discriminating between patients with SAHS and severe SAHS was identified. Results. One hundred and four subjects were included; 73 were men (70%); mean age was 52 ± 10.1 years; body mass index was 30 ± 4.1, and AHI = 29 ± 23.2/h. A correlation was observed between the AHI and oximetry variables, particularly ODI3 (r = 0.850; ) and ODI4 (r = 0.912; ). For an AHI ≥ 10/h, the ODI3 had an AUC = 0.941 (95% confidence interval (CI) = 0.899–0.982) and the ODI4, an AUC = 0.984 (95% CI = 0.964–1), with the ODI4 having the best cut-off point (5.4/h). Similarly, for an AHI ≥ 30/h, the ODI4 had an AUC = 0.922 (95% CI = 0.859–0.986), with the best cut-off point being 10.5/h. Conclusion. Nocturnal oximetry is useful for diagnosing and evaluating the severity of SAHS. The ODI4 variable was most closely correlated with AHI for both diagnosis.

中文翻译：

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在家过夜脉搏血氧饱和度测量对疑似睡眠呼吸障碍患者的有用性

背景和目标。确定夜间血氧饱和度与多谱图在睡眠呼吸暂停低通气综合征 (SAHS) 的诊断和分类中的诊断率。方法。在大学医院进行的前瞻性研究。包括临床怀疑 SAHS 的受试者。他们所有人都在同一天晚上接受了家庭测谎和血氧测定。呼吸暂停低通气指数 (AHI) 和血氧测定变量之间存在相关性。使用曲线下面积 (AUC) 计算具有最高诊断价值的变量，并确定区分 SAHS 和重度 SAHS 患者的最佳截断点。结果. 包括一百零四个科目；73 名男性（70%）；平均年龄为 52 ± 10.1 岁；体重指数为 30 ± 4.1，AHI = 29 ± 23.2/h。观察到 AHI 和血氧测量变量之间存在相关性，尤其是 ODI3 ( r  = 0.850；)和 ODI4 ( r  = 0.912;）。对于 AHI ≥ 10/h，ODI3 的 AUC = 0.941（95% 置信区间 (CI) = 0.899–0.982），ODI4 的 AUC = 0.984（95% CI = 0.964–1），ODI4 有最佳截止点（5.4/h）。同样，对于 AHI ≥ 30/h，ODI4 的 AUC = 0.922（95% CI = 0.859–0.986），最佳截止点为 10.5/h。结论。夜间血氧饱和度可用于诊断和评估 SAHS 的严重程度。ODI4 变量与两种诊断的 AHI 最密切相关。