Page 34 - Portuguese Journal - SPORL - Vol 61. Nº1

Table 1
Demographic and sleep data (median) of the study sample

Median (IQR) Min-max
Men (n(%)) 159 (64,9%) -
Age (years) 57 ± 20 20-91
BMI (kg/m2) 29.4 ± 6,3 20.5 – 58.7
Supine time (%) 34.2 ± 37.5 0.2 – 100
Non-supine time (%) 65.8 ± 37.3 0 – 99.7
AHI 17.8 ± 21.3 5.1 – 110.8
AHI supine 30.9 ± 36.2 0 – 122.4
AHI non-supine 9.9 ± 16 0 – 109.5
ODI 19 ± 21.5 5 – 129.3
ODI supine 31.2 ± 33.7 0 – 126.1
ODI non-supine 12.4 ± 19.6 0 – 129.7
Mean desaturation drop (%) 4.6 ± 1.6 3.2 – 18.7
Mean desaturation drop supine (%) 4.2 ± 2.2 0 – 17.1
Mean desaturation drop non-supine (%) 3.9 ± 1.1 0 – 19.9
Snoring (%) 14.3 ± 29 0 – 74.7
Snoring supine (%) 8.7 ± 22.8 0 – 74.9
Snoring non-supine (%) 13.7 ± 35 0 – 82.6
Abbreviations: BMI, body mass index; AHI, apnea/hypopnea index; ODI, oxygen desaturation index, IQR, interquartile range.

Graph 2
Prevalence of P-OSAS (Cartwright and APOC definition) and total eP-OSAS according to the OSAS
severity.

Abbreviations: P-OSAS, positional obstructive sleep apnea syndrome; eP-OSAS, exclusive P-OSAS; APOC,
Amsterdam Positional OSA Classification
With regard to eP-OSAS, the most significant (Table 4). This binomial logistic regression
predictors were time in the supine position model (including time in the supine position
(β=0.031, p<0.001) and ODI (β=-0.129, p<0.001) and ODI) correctly classified 80.8% of the

34 Portuguese Journal of Otorhinolaryngology - Head and Neck Surgery