Evidence-Based Complementary and Alternative Medicine / 2012 / Article / Tab 2

Research Article

The Effect of Lavender Aromatherapy on Autonomic Nervous System in Midlife Women with Insomnia

Table 2

Comparison of HRV parameters in the 4th and 12th weeks before and after lavender fragrance stimuli in the experimental group.

VariableBefore inhalationAfter inhalation value

HR (bpm)
 4th week72.5 (65, 77)68 (64, 72)<0.00*
 12th week77 (73, 88)74 (67, 82)<0.00*
SDNN (ms)
 4th week34.25 (22.84, 45.99)35.32 (30.07, 46.80)0.007*
 12th week23.60 (20.39, 39.07)34.52 (22.74, 40.95)0.011*
RMSSD (ms)
 4th week24.58 (15.97, 36.75)28.68 (23.27, 38.93)0.003*
 12th week18.26 (14.52, 27.29)23.25 (19.06, 35.33)0.031*
TP (ms2)
 4th week804.5 (461, 1443)887.5 (610, 1896)0.132
 12th week497 (236, 1211)781 (310, 1228)0.299
VLF (ms2)
 4th week279.88 (179.63, 654.97)418.41 (206.44, 842.06)0.228
 12th week224.23 (106.74, 461.38)318.36 (121.96, 489.44)0.468
LF (ms2)
 4th week213.74 (94.89, 499.63)284.64 (102.17, 557.60)0.602
 12th week114.02 (53.36, 454.59)202.22 (63.92, 344.73)0.652
HF (ms2)
 4th week140.66 (74.88, 270.39)183.56 (104.89, 341.60)0.039*
 12th week102.42 (48.33, 183.01)153.12 (95.31, 236.38)0.036*
LFnu (%)
 4th week61.37 (39.65, 75.22)62.17 (41.15, 75.46)0.663
 12th week62.75 (52.63, 66.82)50.54 (39.02, 75.26)0.065
HFnu (%)
 4th week38.63 (24.78, 60.35)37.83 (24.54, 58.85)0.663
 12th week37.26 (33.18, 47.37)49.46 (24.74, 60.98)0.065
LFnu/HEnu (ratio)
 4th week1.59 (0.66, 3.04)1.65 (0.70, 3.07)0.912
 12th week1.68 (1.11, 2.01)1.02 (0.64, 3.04)0.134

Values are expressed as median (interquartile range). *indicates a significant difference before and after treatment using Wilcoxon signed-rank test ( ).