Page 36 - Portuguese Journal - SPORL - Vol 61. Nº1

Table 3
Characteristics of eP-OSAS patients compared to eNP-OSAS patients

SAOS-Pe (APOC I) SAOS-NPe Valor P
N 52 193
Men (n(%)) 35 (67.3%) 124 (64.2%) 0.682
Age (years) 53 ± 24 58 ± 29 0.014
BMI (kg/m2) 27.65 ± 5 30.4 ± 6.2 0.002

Supine time (%) 46.05 ± 25.7 28 ± 40.6 <0.001
Non-supine time (%) 53.9 ± 25.7 72 ± 40.3 <0.001
AHI 10.9 ± 9.7 21.1 ± 25 <0.001
AHI supine 23.4 ± 19.5 34.4 ± 39.9 <0.001
AHI non-supine 2.5 ± 2.5 13 ± 19.3 <0.001
ODI 11.45 ± 7.2 23.2 ± 26.9 <0.001
ODI supine 22.65 ± 17.8 36.1 ± 36.8 <0.001
ODI non-supine 3.4 ± 3 15.8 ± 20.8 <0.001
Mean desaturation drop (%) 4.1 ± 1 4.7 ± 2 <0.001
Mean desaturation drop supine (%) 4.25 ± 1.1 4.6 ± 2.5 0.149
Mean desaturation drop non-supine (%) 3.4 ± 0.6 4.1 ± 1.3 <0.001
Snoring (%) 8.2 ± 21.9 16.7 ± 32.6 0.003
Snoring supine (%) 12.2 ± 29.2 8.1 ± 20.5 0.071

Snoring non-supine (%) 2.75 ± 14.9 17.9 ± 38 <0.001
Abbreviations: eP-OSAS, exclusive positional obstructive sleep apnea syndrome; eNP-OSAS, exclusive non-positional OSAS; BMI,
body mass index; AHI, apnea/hypopnea index; AHI, apnea/hypopnea index; ODI, oxygen desaturation index.

Table 4
Binomial logistic regression model for the most significant predictive factors of P-OSAS and eP-OSAS

Parameters β SE Wald Df OR (95% CI) P-value
Age (years) -0.029 0.012 5.608 1 0.971 (0.948 – 0.995) 0.018
P-OSAS Cartwright BMI (kg/m2) -0.125 0.035 12.862 1 0.882 (0.824 – 0.945) <0.001
criteria ODI (events/h) -0.031 0.009 11.667 1 0.969 (0.952 – 0.987) 0.001

Supine time (%) 0.014 0.007 4.343 1 1.014 (1.001 – 1.027) 0.037
BMI (kg/m2) -0.073 0.031 5.397 1 0.930 (0.874 – 0.989) 0.02
P-OSAS APOC
criteria Supine time (%) 0.022 0.006 11.914 1 1.022 (1.009 – 1.035) 0.001
ODI (events/h) -0.037 0.009 16.094 1 0.964 (0.946 – 0.981) 0.007
ODI (events/h) -0.129 0.026 24.636 1 0.879 (0.835 – 0.925) <0.001
eP-OSAS
Supine time (%) 0.031 0.008 16.380 1 1.031 (1.016 – 1.047) <0.001

Abbreviations: P-OSAS, positional obstructive sleep apnea syndrome; eP-OSAS, exclusive P-OSAS; APOC, Amsterdam Positional
OSA Classification; BMI, body mass index; ODI, oxygen desaturation index; OR, odds ratio; CI, confidence interval.

The lower severity of OSAS in patients are in agreement with those reported in
with P-OSAS or eP-OSAS is evident in the previous studies . Similar to other studies 7,8,9 ,
9
percentage of severe OSAS among P-OSAS we observed that the group of patients
(22%), and eP-OSAS (4%) patients. These data classified as P-OSAS slept longer in the supine

36 Portuguese Journal of Otorhinolaryngology - Head and Neck Surgery