Table 4.

Heart rate variability measures

Variable	Men without OSA (n = 11)	Men with OSA (n = 11)	p value
R–R (S)	1.00 (0.09)	0.97 (0.09)	0.426
Ptot (ms2, log)	3.09 (0.36)	2.85 (0.32)	0.079
PLF (ms2, log)	2.61 (0.37)	2.32 (0.40)	0.070
PHF (ms2, log)	2.10 (0.46)	1.91 (0.43)	0.292
PLF/PHF (log)	0.41 (0.32)	0.50 (0.33)	0.475
Pvlf (ms2, log)	2.81 (0.39)	2.58 (0.30)	0.099

Data are means (SD). Spectral indices are log-transformed. The p values are from crude linear regression analyses with bootstrapped standard errors

R–R R–R interval, Ptot total power, PLF power of low-frequency component, PHF power of high-frequency component, Pvlf power of very low-frequency component