Table 3.

AHI = Apnea hypopnea index; AS =Active smoker; CT = Desaturation under 90%; FS= Former smoker; MWU = Mann Withney U; N= Slow wave sleep; NoNi=No nicotine use; PLM = Periodic leg movement; REM = Rapid eye movement; SpO₂ = Mean saturation; Stud = Student-test; TST = Total Sleep time; WASO =Wake time after sleep onset.

	FS (n = 37)	AS (n = 39)	NoNi (n = 86)	FS vs NoNi			AS vs Noni			FS vs AS
	n(%)-means (SD)			Chi2-MWU-Std	p1	p1a	Chi2-MWU-Std	p2	p2a	Chi2-MWU-Std	p5	p5a
N1 (duration)	52.7 (28.6)	59.5 (39.3)	45.8 (27.2)	1333	0.155	0.860	1377	0.110	0.246	680	0.670	0.230
N1 (%)	15.2 (8.43)	16.4 (12.0)	12.6 (7.90)	1275	0.081	0.593	1405	0.147	0.219	720	0.988	0.439
N1 latency (min)	26.8 (27.5)	29.1 (34.6)	20.2 (17.0)	1475	0.522	0.539	1567	0.560	0.886	704	0.856	0.750
N2 duration (min)	157 (50.4)	160 (82.0)	163 (53.2)	−0.595	0.553	0.718	1455	0.238	0.491	672	0.611	0.829
N3 duration (min)	87.9 (40.9)	89.3 (71.1)	97.1 (43.3)	1386	0.258	0.850	1365	0.097	0.049	685	0.704	0.162
REM duration (min)	79.7 (39.8)	78.1 (48.9)	80.9 (43.1)	1571	0.914	0.623	1572	0.576	0.722	684	0.697	0.758
REM (%)	20.3 (7.76)	19.5 (9.76)	20.4 (6.99)	1568	0.901	0.433	1594	0.660	0.990	0.394	0.695	0.721
REM latency (min)	109 (58.3)	127 (103)	118 (92.1)	1541	0.783	0.218	1593	0.656	0.634	685	0.708	0.242
1st REM duration (min)	19.7 (14.7)	18.4 (11.2)	19.2 (12.0)	1552	0.832	0.914	1642	0.854	0.764	710	0.905	0.726
TST (min)	378 (83.4)	388 (158)	390 (72.1))	1497	0.604	0.953	1488	0.315	0.943	699	0.815	0.883
Efficiency (%)	81.3 (12.0)	80.8 (14.3)	83.8 (10.9)	1417	0.339	0.826	1537	0.457	0.763	717	0.963	0.731
WASO (min)	56.6 (49.1)	58.0 (58.7)	51.8 (51.5)	1469	0.503	0.139	1498	0.341	0.551	714	0.938	0.372

Statistically significant results in bold.

^aCorrection for the following factors: Age, gender; BMI, AHI $\ge 15,\text{PLM}\ge 15/\mathrm{H};\text{MADRS}\ge$ 15; alcohol consumption, antidepressant treatment.