Page 35 - Portuguese Journal - SPORL - Vol 61. Nº1

Table 2
Characteristics of P-OSAS patients compared to NP-OSAS patients

P-OSAS P-OSAS
(Cartwright) NP-OSAS P-value (APOC) NP-OSAS P Value
N 159 86 136 109
Men (n(%)) 110 (69.2%) 49 (57%) 0.056 91 (66.9%) 68 (62.4%) 0.056
Age (years) 55 ± 21 60 ± 18 0.011 56 ± 20 58 ± 20 0.559

BMI (kg/m2) 28.4 ± 5.3 32.4 ± 8.4 <0.001 28.15 ± 5.8 31 ± 7.3 <0.001
Supine time (%) 39.7 ± 37.4 27.85 ± 39.5 0.12 42.7 ± 30.2 21.6 ± 44.9 <0.001
Non-supine time (%) 60.3 ± 37.4 72.15 ± 39.5 0.011 57.3 ± 30.2 77.2 ± 44.8 <0.001
AHI 15.9 ± 15.1 24.25 ± 41.1 0.001 16.85 ± 14.3 20.2 ± 37.4 0.026
AHI supine 32.2 ± 32 20.1 ± 39.7 0.001 31.2 ± 23.6 30 ± 53 0.575
AHI non-supine 7.1 ± 9 25 ± 31.7 <0.001 7.1 ± 9.2 17.5 ± 31 <0.001
ODI 16.6 ± 15.8 26.05 ± 39.2 <0.001 17.35 ± 14.4 24.4 ± 37.3 0.001
ODI supine 32.3 ± 30.5 26.55 ± 40.8 0.084 31.05 ± 24.4 31.2 ± 51.6 0.753
ODI non-supine 9 ± 10.4 26.45 ± 36.1 <0.001 9.3 ± 10.1 21.2 ± 31.9 <0.001
Mean desaturation drop (%) 4.6 ± 1.4 4.6 ± 1.6 0.02 4.6 ± 1.6 4.6 ± 2 0.415
Mean desaturation drop
supine (%) 4.6 ± 2 4.2 ± 2.2 0.028 4.75 ± 1.7 4.2 ± 3 0.017
Mean desaturation drop
non-supine (%) 3.7 ± 0.8 3.9 ± 1.1 <0.001 3.8 ± 0.9 4.3 ± 1.4 <0.001
Snoring (%) 14.3 ± 31.1 14.4 ± 27 0.919 12.55 ± 24.4 18 ± 34.2 0.037
Snoring supine (%) 9.2 ± 21.9 6.75 ± 23.3 0.052 11.25 ± 23.6 5.4 ± 19.4 0.001
Snoring non-supine (%) 11.5 ± 35.5 16.4 ± 33.9 0.128 8.2 ± 26 17.9 ± 39.7 0.002
Abbreviations: P-OSAS, positional obstructive sleep apnea syndrome; NP-OSAS, non-positional OSAS; APOC, Amsterdam Positional
OSA Classification; BMI, body mass index; AHI, apnea/hypopnea index; ODI, oxygen desaturation index.

patients. Sensitivity, specificity, positive Lee et al. reported a P-OSAS prevalence of
predictive value, and negative predictive 75.6% with the Cartwright criteria and an eP-
value were 32.7%, 93.8%, 58.6%, and 83.8%, OSAS prevalence of 39.9% in a sample of 1052
respectively. Korean adults, which was defined as subtype
I, with the AHI in the non-supine position
Discussion inferior to 5 events/h . This was slightly higher
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P-OSAS has been gaining attention as a than the prevalence found in the present
subtype of OSAS in the scientific community study, especially of eP-OSAS, which may be
in recent decades, mainly due to the related to the physiognomic features of the
technological development in positioners. Asian population, namely a short skull base
The growing number of publications on the and retrognathia. In 2018, Levendowski et al.
topic and the search for better P-OSAS criteria reported a P-OSAS prevalence of 64.8% and
to select candidates for positional therapy to 50.7% in a sample of 142 patients, using the
attest to this fact. Cartwright and APOC criteria, respectively .
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In the present study, the prevalence of More recently, in one of the largest studies on
P-OSAS and eP-OSAS in patients diagnosed the characteristics and prevalence of P-OSAS
with OSAS was 55.5% and 21.2%, respectively. and eP-OSAS, Sabil et al. found a prevalence
These findings are in agreement with those of 53.5% and 20.1% respectively, among 6437
described in the reviewed literature. In 2016, French patients .
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Volume 61 . Nº1 . March 2023 35