Table 4.
Bland-Altman parameters for the comparison between polysomnography and the Xiaomi Mi Band 5 in the total sample as well as the no sleep disorders (No SDis) and sleep disorders (SDis) groups.
|
|
Bias (SD; 95% CI) | Agreement limits | Number of participants exceeding the agreement limits, n (%) | |
| Initial sleep onset (hh:mm) | ||||
|
|
Total sample | 00:17 (01:44; 00:49 to 00:13) | −03:06 to 03:40 | 2 (4)a |
|
|
No SDis group | 00:27 (02:13; 01:29 to 00:35) | −01:36 to 02:30 | 2 (10)b |
|
|
SDis group | 00:09 (01:17; 00:41 to 00:21) | −02:22 to 02:40 | 0 (0)c |
| TSTd (min) | ||||
|
|
Total sample | −29.54 (72.54; −7.75 to 51.33) | −171.72 to 112.63 | 3 (7)a |
|
|
No SDis group | −14.71 (78.94; −51.66 to 22.23) | −169.44 to 140.01 | 1 (5)b |
|
|
SDis group | −41.41 (66.20; −68.73 to 14.08) | −171.18 to 88.36 | 2 (8)c |
| TSPDe (min) | ||||
|
|
Total sample | 1.89 (44.97; −11.61 to 15.40) | −86.25 to 90.04 | 1 (2)a |
|
|
No SDis group | 12.24 (25.75; 0.19 to 24.29) | −38.24 to 62.73 | 0 (0)b |
|
|
SDis group | −6.38 (54.97; −29.07 to 16.31) | −114.14 to 101.37 | 1 (4)c |
| WASOf (min) | ||||
|
|
Total sample | 31.44 (71.13; 10.07 to 52.81) | −107.97 to 170.86 | 4 (9)a |
|
|
No SDis group | 26.96 (61.92; −8.00 to 61.93) | −119.47 to 173.40 | 1 (5)b |
|
|
SDis group | 35.03 (69.48; 6.35 to 63.71) | −101.15 to 171.21 | 3 (12)c |
| Awakenings (>5 min; number per night) | ||||
|
|
Total sample | 2.95 (2.57; 3.73 to 2.18) | −2.07 to 3.73 | 4 (9)a |
|
|
No SDis group | 3.25 (2.63; 4.48 to 2.01) | −1.91 to 8.41 | 3 (15)b |
|
|
SDis group | 2.72 (2.54; 3.77 to 1.67) | −2.26 to 7.70 | 1 (4)c |
| SOLg (min) | ||||
|
|
Total sample | −8.62 (53.76; −24.77 to 7.53) | −114.00 to 96.75 | 2 (4)a |
|
|
No SDis group | −12.28 (25.69; −24.31 to 0.26) | −62.65 to 38.08 | 0 (0)b |
|
|
SDis group | −5.7 (68.97; −34.17 to 22.77) | −140.88 to 129.48 | 2 (8)c |
| SEh (%) | ||||
|
|
Total sample | −5.82 (17.67; −11.13 to 0.51) | −40.46 to 28.82 | 4 (9)a |
|
|
No SDis group | −3.85 (17.37; −11.71 to 4.54) | −37.63 to 30.46 | 2 (10)b |
|
|
SDis group | −7.60 (18.06; −15.06 to 0.14) | −43.00 to 27.80 | 2 (8)c |
| Time in N1+N2 sleep (light sleep; min) | ||||
|
|
Total sample | −29.81 (67.98; −50.24 to 9.39) | −163.07 to 103.44 | 2 (4)a |
|
|
No SDis group | −42.04 (58.04; −69.20 to 14.87) | −155.81 to 71.72 | 0 (0)b |
|
|
SDis group | −20.03 (74.72; −50.88 to 10.81) | −166.49 to 126.42 | 2 (8)c |
| Time in N3 sleep (deep sleep; min) | ||||
|
|
Total sample | −14.64 (59.97; −26.08 to 3.20) | −89.27 to 59.98 | 0 (0)a |
|
|
No SDis group | 3.17 (33.00; −12.28 to 18.62) | −61.53 to 67.86 | 0 (0)b |
|
|
SDis group | −28.89 (36.32; −43.88 to 13.90) | −100.08 to 36.32 | 0 (0)c |
| Time in REMi sleep (min) | ||||
|
|
Total sample | 19.49 (36.40; 8.55 to 30.42) | −51.85 to 90.84 | 2 (4)a |
|
|
No SDis group | 24.05 (40.30; 5.20 to 42.92) | −54.93 to 103.05 | 0 (0)b |
|
|
SDis group | 15.83 (33.34; 2.07 to 29.60) | −49.52 to 81.20 | 2 (8)c |
| Awake (min) | ||||
|
|
Total sample | 28.36 (72.69; 50.20 to 6.52) | −114.11 to 170.84 | 3 (7)a |
|
|
No SDis group | 14.71 (78.93; 51.65 to 22.23) | −140.00 to 169.43 | 2 (10)b |
|
|
SDis group | 41.41 (66.21; 14.08 to 68.74) | −88.36 to 171.18 | 1 (4)c |
an=45.
bn=20.
cn=25.
dTST: total sleep time.
eTSPD: total sleep period duration.
fWASO: wake after sleep onset.
gSOL: sleep onset latency.
hSE: sleep efficiency.
iREM: rapid eye movement.