Intraclass Reliability Coefficients (95% CI) | Days of Monitoring Required to Achieve Acceptable Reliabilities of | |||||||
---|---|---|---|---|---|---|---|---|
1 Day | 4 Days | 7 Days | 14 Days | 0.7 | 0.8 | 0.9 | ||
All Participants (N = 151) | Sleep Duration | 0.46 (0.40, 0.52) | 0.71 (0.63, 0.78) | 0.84 (0.80, 0.88) | 0.92 (0.89, 0.93) | 2.74 | 4.70 | 10.57 |
Fragmentation Index | 0.55 (0.49, 0.61) | 0.82 (0.76, 0.86) | 0.90 (0.87, 0.92) | 0.94 (0.93, 0.95) | 1.91 | 3.27 | 7.36 | |
Sleep Efficiency | 0.63 (0.57, 0.68) | 0.83 (0.78, 0.87) | 0.92 (0.90, 0.94) | 0.96 (0.95, 0.97) | 1.37 | 2.35 | 5.29 | |
Sleep Latency | 0.33 (0.27, 0.39) | 0.40 (0.23, 0.55) | 0.73 (0.66, 0.79) | 0.86 (0.83, 0.89) | 4.74 | 8.12 | 18.27 | |
Wake After Sleep Onset | 0.64 (0.59, 0.70) | 0.85 (0.81, 0.89) | 0.93 (0.91, 0.94) | 0.96 (0.95, 0.97) | 1.31 | 2.25 | 5.06 | |
Older Adults without Mild Cognitive Impairment (N = 69) | Sleep Duration | 0.52 (0.43, 0.62) | 0.75 (0.64, 0.84) | 0.86 (0.81, 0.91) | 0.93 (0.91, 0.95) | 2.15 | 3.69 | 8.31 |
Fragmentation Index | 0.44 (0.35, 0.54) | 0.75 (0.63, 0.83) | 0.85 (0.79, 0.90) | 0.91 (0.88, 0.94) | 2.97 | 5.09 | 11.45 | |
Sleep Efficiency | 0.61 (0.53, 0.70) | 0.82 (0.74, 0.88) | 0.91 (0.87, 0.94) | 0.95 (0.94, 0.97) | 1.49 | 2.56 | 5.75 | |
Sleep Latency | 0.31 (0.23, 0.41) | 0.37 (0.08, 0.58) | 0.73 (0.62, 0.82) | 0.85 (0.80, 0.90) | 5.19 | 8.90 | 20.03 | |
Wake After Sleep Onset | 0.58 (0.50, 0.67) | 0.83 (0.76, 0.89) | 0.91 (0.88, 0.94) | 0.95 (0.93, 0.95) | 1.69 | 2.90 | 6.52 | |
Older Adults with Mild Cognitive Impairment (N = 82) | Sleep Duration | 0.40* (0.32, 0.49) | 0.65* (0.51, 0.76) | 0.80 (0.73, 0.86) | 0.90 (0.86, 0.93) | 3.50 | 6.00 | 13.50 |
Fragmentation Index | 0.61** (0.53, 0.69) | 0.84* (0.78, 0.89) | 0.91* (0.88, 0.94) | 0.95** (0.94, 0.97) | 1.49 | 2.56 | 5.75 | |
Sleep Efficiency | 0.64 (0.57, 0.72) | 0.84 (0.77, 0.89) | 0.92 (0.89, 0.95) | 0.94 (0.92, 0.96) | 1.31 | 2.25 | 5.06 | |
Sleep Latency | 0.35 (0.27, 0.44) | 0.48 (0.28, 0.65) | 0.73 (0.63, 0.81) | 0.87 (0.83, 0.91) | 4.33 | 7.43 | 16.71 | |
Wake After Sleep Onset | 0.68* (0.61, 0.75) | 0.86 (0.81, 0.91) | 0.93 (0.91, 0.95) | 0.97* (0.95, 0.98) | 1.10 | 1.88 | 4.24 |