Is Mean Platelet Volume Really a Severity Marker for Obstructive Sleep Apnea Syndrome without Comorbidities?

Table 2

Sleep characteristics of the patients.

	Group 1; (AHI < 5)	Group 2; (AHI 5–15)	Group 3; (AHI 15–30)	Group 4; (AHI > 30)	value
Patient number	30	38	41	91
TST (min)	415.15 ± 50.81	383.33 ± 54.11	386.55 ± 57.39	380.59 ± 64.38	0.05
Sleep efficiency (%TST)	86.52 ± 9.09	80.47 ± 10.09	80.79 ± 10.03	83.03 ± 10.24	0.052
Stage 1 (%TST)	5.34 ± 1.92	6.72 ± 2.47	7.52 ± 2.87	10.6 (9.1)	0.001*
Stage 2 (%TST)	51.98 ± 7.16	52.09 ± 6.53	50.83 ± 9.83	53.37 ± 10.26	0.510
Stage 3 (%TST)	20.86 ± 6.70	19.98 ± 7.19	21.00 ± 9.53	16 (13.2)	0.001*
REM (%TST)	21.56 ± 6.32	20.72 ± 5.72	20.64 ± 6.57	17.08 ± 7.17	0.001*
AHI (events/hour)	2.84 ± 1.41	9.58 ± 2.91	21.12 ± 3.88	54.17 ± 18.81	0.001*
Average SpO2 (%)	96.79 ± 1.47	94.13 ± 12.65	95.35 ± 1.59	95.17 ± 1.54	0.296
Minimum SpO2 (%)	91.70 ± 3.88	88.55 ± 4.72	82.29 ± 12.82	74.98 ± 14.09	0.001*
Time duration with SpO2 < %90	0.001 (0.001)	1.78 ± 4.04	3.5 (9.25)	23.1 (71.9)	0.001*
ODI	1.5 (2.57)	7 (7.47)	20.85 ± 6.16	49.42 ± 20.41	0.001*

TST: total sleep time; AHI: apnea hypopnea index; REM: rapid eye movement; AHI: apnea-hypopnea index; ODI: oxygen desaturation index; P < 0.05.