Table 3.
Mean and interquartile range (IQR) SF-12 summary perceived health scores among respondents with and without insomnia as a function of nighttime symptom profile (n = 6,791)
| MCS1 |
PCS1 |
SF-6D1 |
||||
|---|---|---|---|---|---|---|
| Mean | (IQR) | Mean | (IQR) | Mean | (IQR) | |
| I. Total sample and overall subsamples with and without insomnia | ||||||
| Total sample | 53.2 | (49.8-57.7) | 51.7 | (48.9-57.3) | 83.7 | (78.1-92.2) |
| No insomnia | 54.5 | (51.7-58.2) | 52.6 | (50.0-57.5) | 86.0 | (81.5-92.2) |
| Any insomnia | 48.9* | (43.4-55.7) | 48.9* | (43.5-56.9) | 76.5* | (65.9-86.2) |
| χ21 | 555.2** | 224.8** | 807.1** | |||
| II. Insomnia with particular nighttime symptoms2 | ||||||
| DIS3 | 47.0* | (39.9-54.4) | 47.8* | (41.9-56.5) | 73.6* | (64.2-85.9) |
| DMS3 | 48.7* | (42.8-55.8) | 47.7* | (41.2-56.3) | 75.1* | (65.6-86.1) |
| EMA3 | 49.4* | (44.0-55.9) | 48.6* | (43.0-56.8) | 76.7* | (65.9-86.2) |
| NRS3 | 46.2* | (39.4-53.6) | 46.2* | (39.2-56.1) | 71.4* | (61.8-82.3) |
| III. Number of nighttime symptoms among respondents with Insomnia | ||||||
| Exactly 1 | 50.2* | (45.7-56.3) | 50.7* | (46.4-57.2) | 79.4* | (72.0-89.8) |
| Exactly 2 | 48.4* | (42.8-55.5) | 49.18 | (43.6-56.9) | 76.0* | (65.8-86.1) |
| Exactly 3 | 46.8* | (39.3-54.0) | 45.1* | (38.1-54.5) | 70.9* | (61.5-81.2) |
| All 4 | 45.4* | (37.4-53.3) | 41.6* | (28.8-54.5) | 67.0* | (57.4-78.4) |
| χ23 | 51.0** | 89.1** | 152.9** | |||
| IV. Insomnia multivariate nighttime symptom profiles4 | ||||||
| DIS-only | 48.2* | (40.9-55.0) | 51.3* | (48.9-57.2 | 78.3* | 71.2-88.1 |
| DMS-only | 50.6* | (45.4-57.0) | 49.8* | (44.4-56.9) | 78.6* | (69.7-86.3) |
| EMA-only | 51.4* | (48.1-56.9) | 51.8 | (48.3-57.2) | 81.8* | (73.8-90.4) |
| NRS-only | 47.7* | (42.2-54.1) | 49.4* | (44.8-57.1) | 75.6* | (65.8-86.0) |
| χ23 | 18.2** | 14.8** | 29.5** | |||
| DIS-DMS | 48.1* | (42.1-55.4) | 49.7* | (46.0-57.2) | 76.6* | (65.6-86.3) |
| DIS-EMA | 48.3* | (41.8-55.1) | 52.2 | (49.9-57.4) | 77.7* | (65.9-87.5) |
| DIS-NRS | 44.2* | (36.2-52.5) | 48.6* | (43.7-56.2) | 71.7* | (60.8-84.2) |
| DMS-EMA | 50.1* | (45.7-57.0) | 48.5* | (42.7-57.2) | 77.2* | (67.3-86.1) |
| DMS-NRS | 47.2* | (41.4-53.6) | 46.7* | (39.3-54.3) | 72.0* | (61.8-79.9) |
| EMA-NRS | 46.5* | (39.6-55.5) | 49.7 | (42.7-58.3) | 74.6* | (64.7-86.2) |
| χ25 | 16.3** | 10.3 | 22.8** | |||
| DIS-DMS-EMA | 47.5* | (40.1-54.5) | 46.0* | (38.2-55.1) | 72.3* | (61.7-82.0) |
| DIS-DMS-NRS | 44.3* | (36.5-51.8) | 44.3* | (35.4-53.8) | 68.1* | (58.1-75.7) |
| DIS-EMA-NRS | 46.0* | (39.6-49.5) | 44.7* | (35.7-50.5) | 69.1* | (60.5-77.4) |
| DMS-EMA-NRS | 48.3* | (40.5-54.3) | 43.7* | (32.7-54.3) | 71.2* | (62.4-81.0) |
| χ23 | 6.0 | 3.8 | 8.9** | |||
| DIS-DMS-EMA-NRS | 45.4* | (37.4-53.3) | 41.6* | (28.8-54.5) | 67.0* | (57.4-78.4) |
Significant difference in the mean outcome score compared to respondents without insomnia.
Significant variation in the mean outcome scores among subgroups in the same part of the table. The tests in Part I evaluate the significance of differences between all respondents with insomnia versus all those without insomnia. The tests in Part III evaluate the significance of differences among respondents with insomnia depending on number of nighttime symptoms. The tests in subsets of Part IV, finally, evaluate the significance of differences among insomniacs with the same number of symptoms as a function of symptom profiles.
MCS, Mental Component Summary; PCS, Physical Component Summary; SF-6D, a preference-based health utility index that combines information from the MCS and PCS.
The results reported in these four rows are for overlapping subsamples of respondents with insomnia who have the symptom in the row regardless of whether they also have any of the other three symptoms.
Means on all three scales different significantly across the 15 insomnia symptom profiles: χ214 = 95.5, P < 0.001 for MCS; 124.3, P < 0.001 for PCS; 214.6, P < 0.001 for SF-6D.