Table 3.

Typical error of measurement (TEM) expressed in raw values and as a coefficient of variation (CV%), mean difference, range of mean difference and intra-class correlation (ICC) for each sleep variable between ACT1 and ACT2.

	TEM (95% CL)	CV% (95% CL)	Mean difference(±SD)	Range of mean difference (1.96xSD)	ICC (±95% CL)
Total Sleep Time (min)	9.5 8.2–11.3	2.3 2.0–2.8	−2.1±13.4	−28.8 to 24.7	0.99 0.98–0.99 very high
Sleep Efficiency (%)	2.4 2.0–2.9	NA	0.2±3.4	−6.2 to 6.6	0.93 0.89–0.96 very high
Sleep Latency (min)	3.8 3.2–4.6	32.5 26.9–41.1	−0.2±5.4	−10.8 to 10.4	0.97 0.94–0.98 very high
Total Time in Bed (min)	8.5 7.3–10.3	1.5 1.3–1.8	−0.9±12.1	−25.0 to 23.3	0.99 0.99–1.00 very high
Wake After Sleep Onset (min)	3.3 2.8–3.9	37.8 31.5–47.4	0.6±4.6	−8.6 to 9.7	0.85 0.76–0.90 high
Wake Episodes (No. per night)	1.2 1.0–1.4	41.8 34.6–52.6	0.1±1.6	−3.2 to 3.3	0.80 0.70–0.87 high
Sleep Onset Variance (min)	5.4 4.6–6.6	31.8 24.7–44.7	−1.5±7.7	−16.8 to 13.9	0.99 0.99–1.00 very high
Wake Variance (min)	3.6 3.1–4.3	15.0 11.8–20.5	0.5±5.1	−21.9 to 25.5	0.99 0.99–1.00 very high