Background <p>The original Sleep Disorders Questionnaire (SDQ, 1994) contained a 12-item sleep apnea subscale (SDQ-SA). SDQ was shortened by factor analysis in 2024 (SDQ-2) and contains a 14-item subscale “Sleep Disordered Breathing” (SDQ2-SDB). This is the first external validation study of the new scale using polysomnography, with a concurrent validation against four commonly used sleep-disordered breathing questionnaires.</p> Methods <p>Members of a large urban police force (n = 733) completed the SDQ2-SDB, Berlin, STOP-Bang, NoSAS, and GOAL questionnaires. A subgroup (n = 101) also volunteered for a laboratory polysomnogram (PSG). SDQ2-SDB scores were analyzed by ANOVA in both samples. For the NPSG subgroup, Receiver Operating Characteristics (ROC) of the five apnea scales were calculated at a criterion of AHI ≥ 15. A correlation matrix among the five scales was also calculated.</p> Results <p>The NPSG subgroup with higher measured AHI showed significantly higher SDQ2-SDB scores. In the whole sample, SDQ2-SDB scores were significantly higher in males compared with females, in older compared to younger individuals, and in those with higher BMI. Age x Sex, Age x BMI and BMI x Sex effects were also significant. The areas under the ROC curve (AUC) were: SDQ2-SDB = 70%, Berlin = 65%, STOP-Bang = 73%, GOAL = 81%, NoSAS = 85%. The NoSAS AUC was significantly higher (p &lt; 0.03) than those of the SDQ2-SDB, STOP-Bang, and Berlin scales but the latter three scales did not differ significantly from each other. Positive (PPV) and negative (NPV) predictive values of the SDQ2-SDB were 46% and 84% respectively, with the other scales ranging between 35 to 52% PPV and 74 to 89% NPV. The SDQ2-SDB correlated with the other four questionnaires with rho ranging from 0.558 to 0.855.</p> Conclusions <p>The SDQ2-SDB scale demonstrates adequate validity in a non-clinical sample. Its performance is similar to questionnaires commonly used for sleep apnea, like the Berlin and STOP-Bang scales.</p>

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Comparative validation of the Sleep Disordered Breathing scale of the Sleep Disorders Questionnaire 2nd edition and four other sleep apnea questionnaires against polysomnography

  • Alan Douglass,
  • Dianne Groll,
  • Kathleen Biard,
  • Caitlin Higginson,
  • Eva Savage,
  • Karina Fonseca,
  • Malika Lanthier,
  • Defne Oksit,
  • Chloé Léveillé,
  • Arianne Côté,
  • Noémie Leblanc,
  • Rébecca Robillard

摘要

Background

The original Sleep Disorders Questionnaire (SDQ, 1994) contained a 12-item sleep apnea subscale (SDQ-SA). SDQ was shortened by factor analysis in 2024 (SDQ-2) and contains a 14-item subscale “Sleep Disordered Breathing” (SDQ2-SDB). This is the first external validation study of the new scale using polysomnography, with a concurrent validation against four commonly used sleep-disordered breathing questionnaires.

Methods

Members of a large urban police force (n = 733) completed the SDQ2-SDB, Berlin, STOP-Bang, NoSAS, and GOAL questionnaires. A subgroup (n = 101) also volunteered for a laboratory polysomnogram (PSG). SDQ2-SDB scores were analyzed by ANOVA in both samples. For the NPSG subgroup, Receiver Operating Characteristics (ROC) of the five apnea scales were calculated at a criterion of AHI ≥ 15. A correlation matrix among the five scales was also calculated.

Results

The NPSG subgroup with higher measured AHI showed significantly higher SDQ2-SDB scores. In the whole sample, SDQ2-SDB scores were significantly higher in males compared with females, in older compared to younger individuals, and in those with higher BMI. Age x Sex, Age x BMI and BMI x Sex effects were also significant. The areas under the ROC curve (AUC) were: SDQ2-SDB = 70%, Berlin = 65%, STOP-Bang = 73%, GOAL = 81%, NoSAS = 85%. The NoSAS AUC was significantly higher (p < 0.03) than those of the SDQ2-SDB, STOP-Bang, and Berlin scales but the latter three scales did not differ significantly from each other. Positive (PPV) and negative (NPV) predictive values of the SDQ2-SDB were 46% and 84% respectively, with the other scales ranging between 35 to 52% PPV and 74 to 89% NPV. The SDQ2-SDB correlated with the other four questionnaires with rho ranging from 0.558 to 0.855.

Conclusions

The SDQ2-SDB scale demonstrates adequate validity in a non-clinical sample. Its performance is similar to questionnaires commonly used for sleep apnea, like the Berlin and STOP-Bang scales.