Research Article
Postural Changes on Heart Rate Variability among Older Population: A Preliminary Study
Table 3
Descriptive statistics, repeated measures ANOVA, and paired t-test for PNS and SNS subparameters.
| | Subparameter | Mean (standard deviation) | Repeated measures ANOVA results | Paired t-test results | | Sitting (ST) | Supine (SP) | Standing (SD) | ST-SP | SP-SD | ST-SD |
| | PNS | | Mean RR (ms) | 815.13 (103.16) | 865.30 (113.05) | 807.30 (100.92) | | | | NS | | RMSSD (ms) | 14.53 (12.47) | 15.79 (9.52) | 16.23 (14.91) | NS | NS | NS | NS | | SD1 (ms) | 10.31 (8.84) | 11.18 (6.74) | 11.50 (10.56) | NS | NS | NS | NS | | SNS | | Mean HR (bpm) | 74.73 (9.60) | 70.55 (9.35) | 75.48 (9.48) | | | | NS | | Stress index | 29.05 (11.46) | 26.90 (10.74) | 28.64 (11.00) | NS | NS | NS | NS | | SD2 (ms) | 12.86 (8.28) | 13.64 (5.73) | 15.69 (13.00) | NS | NS | NS | NS |
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Note. , , and denote significant levels at 0.05, 0.01, and 0.001, respectively; NS = no significance. |
