Table 2 ICC values and number of days needed to achieve 0.7, 0.8, and 0.9 reliability estimates for sleep outcomes
Night Valid Criteria (%) | Single Day ICC | No. of days to achieve reliabilities of | No. (%) of children meeting reliabilities of | ||||
|---|---|---|---|---|---|---|---|
95% CI | 0.7 | 0.8 | 0.9 | 0.7 | 0.8 | ||
Sleep Duration | |||||||
50 | 0.33 | 0.31, 0.35 | 4.7 | 8.0 | 18.0 | 2094 (76.3) | 1022 (37.2) |
60 | 0.34 | 0.32, 0.36 | 4.5 | 7.6 | 17.2 | 2063 (75.2) | 1002 (36.5) |
70 | 0.34 | 0.32, 0.36 | 4.5 | 7.7 | 17.4 | 2027 (73.8) | 970 (35.3) |
80 | 0.34 | 0.32, 0.36 | 4.5 | 7.7 | 17.4 | 2013 (73.3) | 953 (34.7) |
90 | 0.35 | 0.33, 0.37 | 4.4 | 7.5 | 16.8 | 1995 (72.7) | 922 (33.6) |
100 | 0.36 | 0.34, 0.38 | 4.1 | 7.1 | 16.0 | 1849 (67.4) | 515 (18.8) |
Sleep Efficiency | |||||||
50 | 0.41 | 0.39, 0.43 | 3.4 | 5.8 | 13.0 | 2152 (78.4) | 1891 (68.9) |
60 | 0.41 | 0.39, 0.43 | 3.3 | 5.7 | 12.8 | 2140 (78.0) | 1881 (68.5) |
70 | 0.42 | 0.40, 0.44 | 3.2 | 5.4 | 12.2 | 2126 (77.4) | 1870 (68.1) |
80 | 0.43 | 0.41, 0.45 | 3.1 | 5.3 | 12.0 | 2120 (77.2) | 1863 (67.9) |
90 | 0.44 | 0.42, 0.46 | 3.0 | 5.1 | 11.5 | 2214 (80.7) | 1849 (67.4) |
100 | 0.46 | 0.44, 0.48 | 2.7 | 4.6 | 10.4 | 2153 (78.4) | 1848 (67.3) |
Time in Bed | |||||||
50 | 0.33 | 0.31, 0.35 | 4.7 | 8.0 | 18.1 | 2097 (76.4) | 1082 (39.4) |
60 | 0.34 | 0.32, 0.36 | 4.5 | 7.6 | 17.2 | 2080 (75.8) | 1072 (39.1) |
70 | 0.35 | 0.33, 0.37 | 4.3 | 7.4 | 16.6 | 2045 (74.5) | 1044 (38.0) |
80 | 0.36 | 0.34, 0.38 | 4.2 | 7.2 | 16.1 | 2031 (74.0) | 1031 (37.6) |
90 | 0.36 | 0.34, 0.38 | 4.1 | 7.0 | 15.8 | 2012 (73.3) | 1643 (59.9) |
100 | 0.37 | 0.35, 0.40 | 3.9 | 6.7 | 15.1 | 2025 (73.8) | 1219 (44.4) |
Sleep Onset | |||||||
50 | 0.43 | 0.41, 0.45 | 3.1 | 5.4 | 12.1 | 2034 (74.1) | 1792 (65.3) |
60 | 0.42 | 0.40, 0.44 | 3.3 | 5.6 | 12.6 | 2011 (73.3) | 1775 (64.7) |
70 | 0.42 | 0.40, 0.44 | 3.3 | 5.6 | 12.6 | 1952 (71.1) | 1731 (63.1) |
80 | 0.42 | 0.40, 0.44 | 3.2 | 5.5 | 12.3 | 1941 (70.7) | 1714 (62.4) |
90 | 0.42 | 0.40, 0.45 | 3.2 | 5.4 | 12.2 | 1931 (70.3) | 1698 (61.9) |
100 | 0.44 | 0.42, 0.46 | 3.0 | 5.1 | 11.5 | 1964 (71.5) | 1478 (53.8) |
Wake Time | |||||||
50 | 0.33 | 0.31, 0.35 | 4.7 | 8.1 | 18.1 | 1928 (70.2) | - |
60 | 0.33 | 0.31, 0.36 | 4.6 | 8.0 | 17.9 | 1894 (69.0) | 951 (34.6) |
70 | 0.33 | 0.31, 0.36 | 4.7 | 8.0 | 18.0 | 1839 (67.0) | 928 (33.8) |
80 | 0.34 | 0.32, 0.36 | 4.5 | 7.7 | 17.3 | 1826 (66.5) | 915 (33.3) |
90 | 0.34 | 0.32, 0.37 | 4.5 | 7.6 | 17.2 | 1812 (66.0) | 887 (32.3) |
100 | 0.35 | 0.32, 0.37 | 4.4 | 7.6 | 17.0 | 1672 (60.9) | 500 (18.2) |