Table 3.
Differences among mean and coefficient of variation (CV) of the time series, the heart rate (HR)-to-respiratory rate (f) ratio according to the different coupling patterns
|
Coupling Pattern |
P Value | ||||
|---|---|---|---|---|---|
| A | B | C | D | ||
| No. of patients | 17 | 6 | 19 | 18 | |
| Ventilatory mode | ACV (15) | ACV (0) | ACV (0) | ACV (3) | P = 0.02 |
| IPS (2) | IPS (4) | IPS (7) | IPS (11) | ||
| USB (0) | USB (2) | USB (6) | USB (4) | ||
| Mean RI/RE | 0.31±0.05 | 0.29±0.09 | 0.38±0.04 | 0.29±0.05 | P = 0.005; A and D vs. C |
| CV RI/RE | 0.48±0.03 | 0.45±0.05 | 0.53±0.03 | 0.53±0.03 | P = 0.0006; C and D vs. A and B |
| Mean HR/f | 4.6±1.1 | 8.1±1.9 | 4.3±1.05 | 4.5±1.1 | P = 0.0001; A, C, and D vs. B |
| CV HR/f | 0.13±0.09 | 0.24±0.16 | 0.24±0.08 | 0.27±0.08 | P = 0.02; A vs. D |
Data are means ± SD. P value was determined with χ2 test for ventilatory mode, and one-way ANOVA for mean and coefficient of variation of the time series and HR-to-f ratio. Mean and CV of RI/RE time series are in seconds.