Table 1.
Night- and Daytime Differences in Actigraphy Metrics
| Metric | Day | Group | N | Mean value ± SD (95% CI) |
|---|---|---|---|---|
| Inactive efficiency (NT-DT), unitless fraction | −1 | All* | 23 | 0.126 ± 0.0317 (0.0605, 0.192) |
| +4 | Sham | 6 | −0.055 ± 0.0717 (−0.239, 0.1295) | |
| +4 | CCI*,† | 8 | −0.18 ± 0.0736 (−0.354, −0.0057) | |
| +4 | RNR | 9 | −0.00541 ± 0.0476 (−0.115, 0.104) | |
| Fraction high activity per active time (NT-DT) | −1 | All | 23 | −0.0481 ± 0.0383 (−0.127, 0.0313) |
| +4 | Sham | 6 | −0.0199 ± 0.0847 (−0.238, 0.198) | |
| +4 | CCI | 8 | −0.1 ± 0.1078 (−0.355, 0.155) | |
| +4 | RNR* | 9 | 0.1058 ± 0.0409 (0.0115, 0.2) | |
| Mean active interval length (NT-DT), min | −1 | All* | 23 | −3.472 ± 0.75 (−5.03, −1.92) |
| +4 | Sham | 6 | −0.905 ± 1.343 (−4.36, 2.55) | |
| +4 | CCI | 8 | 0.992 ± 1.269 (−2.01, 3.99) | |
| +4 | RNR | 9 | 0.267 ± 0.964 (−1.96, 2.49) | |
| Density of active intervals (NT-DT), no./h | −1 | All | 23 | 0.775 ± 0.484 (−0.228, 1.779) |
| +4 | Sham | 6 | 0.958 ± 1.223 (−2.186, 4.103) | |
| +4 | CCI | 8 | 0.698 ± 0.911 (−1.455, 2.851) | |
| +4 | RNR | 9 | −0.444 ± 0.794 (−2.275, 1.386) | |
| Settle onset time (NT only), min | −1 | All* | 23 | 12.74 ± 4.23 (3.97, 21.51) |
| +4 | Sham | 6 | 8.83 ± 6.06 (−6.74, 24.4) | |
| +4 | CCI | 8 | 22.38 ± 16.46 (−16.56, 61.31) | |
| +4 | RNR | 9 | 19.33 ± 10.44 (−4.73, 43.4) |
All values are mean ± SD with 95% CI in parentheses.
*
NT-DT difference is significantly different from 0. †Value on day +4 is significantly different from overall group on day −1. Negative values indicate larger daytime magnitudes than nighttime.
NT, nighttime; DT, daytime; RNR, rapid nonimpact head rotation; CCI, controlled cortical impact; SD, standard deviation; CI, confidence interval.