Table 3.

Cardio-respiratory variables comparison in the three studied groups.

Variable	Group	Mean ± Standard deviations	P	THD
Apnea/hypopnea index	NSW-OSAHS OSAHS C	79.11 ± 5.19 59.55 ± 6.55 1.32 ± 0.22	<0.001	n/o > o > c
Mean oxygen saturation	NSW-OSAHS OSAHS C	85.17 ± 1.52 89.33 ± 0.43 93.79 ± 0.36	0.001	n/o < o < c
Minimum oxygen saturation	NSW-OSAHS OSAHS C	71.48 ± 2.12 80.13 ± 1.46 87.05 ± 2.54	0.009	n/o < o < c

NSW = Night shift work. OSAHS = Obstructive sleep apnea/hypopnea syndrome. C = controls. p = probability. THD Tukey honest differences test. n/o = Night shift work/OSAHS group. o = OSAHS group. c = control group.