Table 2. Descriptive statistics for selected rest-activity parameters derived from 14 consecutive days of passive-infrared (PIR) data.
| Parameter | Grm2/3 +/+ (mean ± SEM) | Grm2/3 -/- (mean ± SEM) | p-value |
|---|---|---|---|
| Daily activity (AU) | 2563 ± 209 (n = 12) | 2470 ± 163 (n = 12) | 0.730 |
| Dark phase activity (AU) | 2213 ± 194 (n = 12) | 2032 ± 128 (n = 12) | 0.445 |
| Light phase activity (AU) | 350 ± 19 (n = 12) | 438 ± 52 (n = 12) | 0.124 |
| Relative light phase activity (%) | 14.2 ± 0.9 (n = 12) | 17.4 ± 1.4 (n = 12) | 0.058 |
| Daily activity bouts | 12.6 ± 0.5 (n = 12) | 11.1 ± 0.4 (n = 12) | 0.034 |
| Activity bout duration (min) | 66 ± 4 (n = 12) | 86 ± 5 (n = 12) | 0.006 |
| Interdaily stability (AU) | 0.72 ± 0.02 (n = 12) | 0.77 ± 0.02 (n = 12) | 0.085 |
| Chi-square periodogram amplitude (AU) | 1653 ± 115 (n = 12) | 1627 ± 83 (n = 12) | 0.855 |
| Onset tau error (h) | 0.49 ± 0.06 (n = 12) | 0.60 ± 0.07 (n = 12) | 0.224 |
| Period length (h) | 23.95 ± 0.01 (n = 12) | 23.97 ± 0.02 (n = 12) | 0.372 |
Mice were housed under a 12:12 h light/dark (12:12 LD) cycle at 100 lux. Units of measurement and sample sizes are indicated in brackets. AU = arbitrary units. SEM = standard error of the mean.