Anthropometric screening approach for obstructive sleep apnea in Japanese men: development and validation of the ABC scale

Table 1 Comparisons of clinical and anthropometric variables between the patients in the two phases

	All n = 443	Development phase n = 206	Validation phase n = 237	p-value
Age (years) Body mass index (kg/m²) Neck circumference (cm) Waist circumference (cm) Apnea–hypopnea index (episodes/h) Epworth Sleepiness Scale (score) Hypertension (%) Cardiovascular disorder (%) Diabetes mellitus (%) Heart failure (%)	48.8 ± 12.9 26.2 ± 5.1 39.5 ± 3.2 92.2 ± 11.6 26.4 ± 25.0 11.4 ± 4.9 211 (47.6) 10 (2.3) 48 (10.8) 12 (2.7)	49.8 ± 13.7 26.0 ± 4.9 39.4 ± 3.1 91.7 ± 11.5 24.5 ± 23.8 11.0 ± 4.5 88 (42.7) 5 (2.4) 23 (11.2) 7 (3.4)	47.9 ± 12.1 26.4 ± 5.2 39.6 ± 3.3 92.7 ± 11.7 28.0 ± 25.9 11.7 ± 5.1 123 (51.9) 5 (2.1) 25 (10.5) 5 (2.1)	0.245 0.537 0.498 0.333 0.130 0.119 0.054 0.527 0.777 0.403

Continuous variables are presented as mean ± standard deviation, and the Mann–Whitney U-test was used for comparisons of these variables. Categorical variables are presented as frequency and percentage, and comparisons were made using the chi-square test

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