Table 2
1 Year change of heart rate variability and frequency of premature complexes between baseline and the 1 year measurement
| Day workers | Shift workers | p Value of difference between day and shift worker | |
| n | 22 | 49 | |
| Mean number of night shifts worked between the baseline and repeated measurement | 0 | 63 | |
| Frequency of premature complexes (%): | |||
| Decrease of PAC | 54.6 | 43.7 | 0.62-151 |
| No change in PAC | 4.6 | 0.0 | |
| Increase in PAC | 40.9 | 56.3 | |
| Decrease of PVC | 45.4 | 20.4 | 0.032-151 |
| No change in PVC | 27.3 | 30.6 | |
| Increase in PVC | 27.3 | 48.9 | |
| Heart rate variability: | |||
| Heart rate (bpm) | 1.83 | −2.082-150 | 0.08 |
| SDNNi (ms) | −7.02-150 | −2.0 | 0.2 |
| Loglow (10−3 log ms) | −36.9 | −29.9 | 0.84 |
| Loghigh (10−3 log ms) | −83.92-150 | −16.2 | 0.06 |
| % lf | 1.99 | −0.72 | 0.16 |
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PAC=premature atrial complexes; PVC=premature ventricular complexes; SDNNi=mean of all 5 minute standard deviations of NN intervals; Loglow=power in the low frequency range (0.05–015 Hz) in logarithmic units; Loghigh=power in the high frequency range (0.15–0.40 Hz.) in logarithmic units; % lf=low frequency power (0.05–0.15 Hz) in normalised units.
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↵2-150 p<0.05 v baseline.
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↵2-151 p Value according to Wilcoxon two sample test.
