Table 1. Sleep Data Correlation Structure.
Spearman’s rho correlations comparing parent report to actigraphy measurements. Significant correlations (p<0.05) are indicated in bold italics. Data were collected a) prior to or b) after implementation of parent education intervention. Post-education values were more strongly correlated than pre-education values for actigraphy-measured sleep latency/CSHQ sleep onset delay and actigraphy-measured sleep time (sleep duration)/CSHQ sleep times calculated from bedtime/waketime reports.
| a.
| ||||||||
|---|---|---|---|---|---|---|---|---|
| Source | CSHQ | Actigraphy | ||||||
|
| ||||||||
| Variable | SOD | SD | NW | Bed/ Wake | Sleep Time | SOD | WASO | |
| CSHQ | SOD | 1.00 | ||||||
| SD | 0.19 | 1.00 | ||||||
| NW | 0.13 | 0.04 | 1.00 | |||||
| Bed/Wake | −0.25 | −0.40 | 0.05 | 1.00 | ||||
|
| ||||||||
| Actigraphy | Act ST | 0.06 | −0.13 | −0.06 | 0.30 | 1.00 | ||
| SL | 0.16 | 0.15 | −0.05 | −0.20 | −0.35 | 1.00 | ||
| WASO | −0.28 | −0.07 | 0.15 | 0.22 | −0.41 | 0.09 | 1.00 | |
| b.
| |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Source | CSHQ | Actigraphy | |||||||
|
| |||||||||
| Variable | SOD | SD | NW | Bed/ Wake | Sleep Time | SOD | WASO | ||
| CSHQ | SOD | 1.00 | |||||||
| SD | 0.41 | 1.00 | |||||||
| NW | 0.16 | 0.31 | 1.00 | ||||||
| Bed/Wake | −0.09 | −0.23 | −0.10 | 1.00 | |||||
|
| |||||||||
| Actigraphy | Act ST | 0.04 | −0.14 | −0.08 | 0.46 | 1.00 | |||
| SL | 0.43 | 0.23 | −0.06 | −0.14 | −0.21 | 1.00 | |||
| WASO | −0.20 | 0.02 | 0.11 | 0.24 | −0.28 | −0.22 | 1.00 | ||
SOD=CSHQ sleep onset delay subscale, SD=CSHQ sleep duration subscale, NW=CSHQ night wakings subscale, Bed/Wake=sleep duration calculated from reported weekday bedtimes and wake times, Act ST=actigraphy- measured sleep time at night, SL=actigraphy-measured sleep latency, WASO=actigraphy-measured wake time after sleep onset.