Table 4.
Detection of ANS latent domains by factor analysis: Rotated factor pattern matrix with the varimax method arrested to the first four factors.
| Variables | Factor1 | Factor2 | Factor3 | Factor4 |
|---|---|---|---|---|
| RR HFnu | 92* | 10 | −12 | −14 |
| ΔRRLFnu | 65* | 12 | −22 | −8 |
| RR LF/HF | −57* | −2 | 6 | 11 |
| RR LFnu | −96* | −7 | 8 | 11 |
| RR TP | 15 | 96* | −11 | −17 |
| RR HFa | 40 | 77* | −11 | −9 |
| RR LFa | -21 | 74* | −11 | −15 |
| α index | 17 | 63* | −27 | −25 |
| SAP | −12 | −12 | 96* | 3 |
| SAP Mean | −11 | −13 | 91* | 3 |
| DAP | −19 | −14 | 82* | 8 |
| HR | −15 | −20 | 9 | 96* |
| RR HFHz | −14 | −9 | −3 | 29 |
| RR Mean | 13 | 19 | −7 | −94* |
| RR LFHz | 12 | 6 | −8 | 17 |
| SAP LFa | −14 | 5 | 12 | 3 |
| % of total communality | 40.84% | 18.04% | 16.48% | 11.58% |
| cumulative % of total communality | 40.84% | 58.88% | 75.36% | 86.94% |
Total communality (i.e., total reproduced variance) = 12.267, total variance = 16, percentage of total variance explained = 76.67%. Printed values are correlation coefficients multiplied by 100 and rounded to the nearest integer. Asterisks flag correlation coefficients greater than, or equal to, 0.4 in absolute value. Interpretation of the first four factors: Factor 1 = Oscillatory domain (variables colored in lilac), Factor 2 = Amplitude domain (variables in pink), Factor 3 = Pressure domain (variables in green), Factor 4 = Pulse domain (variables in blue).