| Item | Subjects with multiple ePCI (N = 19) | Subjects with first ePCI (N = 6) | Z | p value |
| Median | Median | |||
| Duration of night-time sleep (min) | 450.00 | 485.00 | −1.08 | 0.28 |
| Actual night-time sleep duration (min) | 402.00 | 449.50 | −1.21 | 0.23 |
| Total daytime nap duration (min) | 54.00 | 22.50 | −1.31 | 0.19 |
| Percent nap duration in the daytime (%) | 5.32 | 2.35 | −1.24 | 0.22 |
| Longest daytime nap duration (min) | 28.00 | 12.50 | −1.50 | 0.14 |
| Daytime activity Index (%) | 91.34 | 97.63 | −2.10 | 0.04 |
| Mean daytime activity index (count/min) | 188.74 | 206.30 | −1.21 | 0.23 |