Validation of the NoSAS Score for the Screening of Sleep-Disordered Breathing in a Sleep Clinic
Table 1
Baseline characteristics of all participants.
Variables
Total
Non-SDB
SDB
value
Number (n)
596
82
514
Male n (%)
397 (66.6%)
51 (62.2%)
346 (67.3%)
0.361
Age (years)
54.4 (±13.9)
48.6 (±12.5)
55.3 (±13.9)
<0.001
BMI (kg/m2)
27.4 (±4.0)
26.1 (±3.9)
27.6 (±4.0)
<0.001
<25 kg/m2n (%)
174 (29.2%)
34 (41.5%)
140 (27.2%)
25 to <30 kg/m2n (%)
273 (45.8%)
36 (43.9%)
237 (46.1%)
0.011&
≥30 kg/m2n (%)
149 (25.0%)
12 (14.6%)
137 (26.6%)
Neck circumference (cm)
39.1 (±3.9)
37.6 (±3.8)
39.4 (±3.9)
<0.001
≤40 cm n (%)
363 (60.9%)
61 (74.4%)
302 (58.8%)
0.007#
>40 cm n (%)
233 (39.1%)
21 (25.6%)
212 (41.2%)
Waist circumference (cm)
98.8 (±18.6)
94.5 (±11.9)
99.6 (±19.3)
<0.001
Hypertension n (%)
356 (59.7%)
47 (57.3%)
309 (60.1%)
0.632
Current smokers n (%)
176 (30.0%)
22 (26.8%)
154 (30.0%)
0.564
STOP-Bang score
4.3 (±1.5)
3.4 (±1.5)
4.4 (±1.4)
<0.001
NoSAS score
9.0 (±3.7)
6.5 (±3.6)
9.4 (±3.6)
<0.001
Nadir SpO2 (%)
83.1 (±10.2)
89.9 (±2.7)
80.7 (±10.8)
<0.001
AHI (events/hour)
16.0 (7.3–35.2)
2.6 (1.5–3.8)
19.3 (10.5–38.5)
<0.001
Age, BMI, neck circumference, waist circumference, nadir SpO2, STOP-Bang score, and NoSAS score are presented as mean ± standard deviation. AHI is presented as median and interquartile range. OSA: sleep-disordered breathing; AHI: apnea-hypopnea index; BMI: body mass index; SDB is defined as AHI ≥ 5 events/h by polysomnography.Non-SDB versus SDB. & value of chi-square test of BMI subgroups.# value of chi-square test of neck circumference subgroups.
