Table 3.
Comparison of HRV in women with IBS and HCs
| HC vs. IBS | IBS Subgroups | |||||||
|---|---|---|---|---|---|---|---|---|
| HC n = 36 |
IBS n = 54 |
pa | IBS-CM n = 25 |
IBS-D n = 29 |
pb | pc | pd | |
| HF (ms2) | 1183 (1243) | 871 (795) | NS | 677 (555) | 1039 (933) | .182 | NS | .140 |
| LF (ms2) | 1453 (992) | 1429 (1047) | NS | 1295 (843) | 1544 (1198) | NS | NS | NS |
| TP (ms2) | 5118 (4487) | 4069 (2622) | NS | 3638 (1887) | 4440 (3106) | NS | NS | NS |
| LF/HF (ratio) | 2.6 (2.6) | 2.9 (2.1) | .095 | 3.0 (1.9) | 2.8 (2.3) | .046 | NS | NS |
| Heart Rate (beats/min.) | 62.3 (8.6) | 64.1 (8.9) | NS | 65.5 (8.3) | 63.0 (9.4) | .133 | NS | .184 |
Note. HRV = heart rate variability. HC = healthy controls. IBS = irritable bowel syndrome. IBS-CM = Constipation- and Mixed-predominant irritable bowel syndrome (IBS) group. IBS-D = Diarrhea-predominant IBS group. HF = high frequency power. LF = low frequency power. TP = Total power (very low power + LF + HF). Comparisons were made with an analysis of covariance using the rank transformation, controlling for age and BMI.
pa= 2 group comparison of IBS vs. HC; pb = IBS-CM vs. HC; pc = IBS-D vs. HC; pd = IBS-CM vs. IBS-D. NS = non-significant (p > .20).