Figure 1
From: Testing of the Czech questionnaire for identifying children at risk of obstructive sleep apnea
Workflow of the Czech questionnaire for identifying children at risk of obstructive sleep apnea (SEN CZ) development; note that although collection of only 70 SEN CZ version 2 questionnaires were planned, 71 were included in the final analysis. AHI apnea–hypopnea index, CZ Czech language, EN English language; *The items were excluded if: (1) they did not use the Likert scale, (2) they had uniform distribution and, thus, low discriminatory power, (3) they were difficult to answer for the responders, (4) they had a weak correlation with AHI (r < 0.2), (5) they had a weak correlation with the total score of the questionnaire, (6) another item related to the same symptom had a higher discriminatory power, and/or (7) their contribution to creating the shortest yet functional screening was considered insufficient.
