Table 5.
Change Scores (Δ) Obtained for Psychological and Health Variables for Good Sleepers and Insomnia Symptoms and Syndrome Incident Cases
| Good Sleepers1 (n = 275) | Incident Cases |
|||||
|---|---|---|---|---|---|---|
| Insomnia Symptoms1 (n = 130) | Insomnia Syndrome1 (n = 32) | |||||
| M (SE) | M (SE) | M (SE) | F | P | r | |
| Changes in Psychological Variables | ||||||
| Δ Beck Depression Inventory II (BDI-II)2 | 0.55a (4.28) | −0.02a (5.05) | 2.44b (8.49) | 5.02 | 0.01 | 0.13 |
| Δ State-Trait-Anxiety Inventory–Trait (STAI)2 | −3.40a (5.83) | −1.82a (6.73) | 1.83b (8.53) | 10.57 | 0.00 | 0.22 |
| Δ Arousal Predisposition Scale (APS)2 | −0.70 (4.17) | −0.59 (4.63) | 0.41 (4.09) | 0.94 | 0.39 | 0.06 |
| Δ Perceived Stress Scale (PSS)2 | −0.98a (5.70) | −0.60a (5.88) | 1.75b (1.37) | 3.01 | 0.05 | 0.10 |
| Changes in Health Variables | ||||||
| SF-12v2 Health Survey 3 | ||||||
| Δ General Health | −0.88 (15.80) | −0.66 (15.55) | −6.55 (20.64) | 1.83 | 0.16 | −0.06 |
| Δ Bodily Pain | 1.91 (20.18) | 1.15 (22.84) | −3.13 (25.20) | 0.78 | 0.46 | −0.05 |
| Δ Mental Health | −0.45a (14.62) | −4.13a (14.38) | −8.20b (18.13) | 5.46 | 0.01 | −0.16 |
| Δ Body Mass Index2 | −0.01 (2.38) | 0.19 (2.55) | 1.20 (2.80) | 2.98 | 0.05 | 0.11 |
| Δ Alcohol Consumption (number of glasses/week)2 | −0.21 (2.96) | 0.41 (3.14) | 0.36 (1.27) | 2.02 | 0.13 | 0.09 |
| Δ Cigarette Smoking4 | 0.00 (0.33) | 0.05 (0.35) | 0.44 (0.08) | 0.88 | 0.42 | 0.08 |
| Δ Physical Activity Practice4 | −0.13 (1.64) | −0.09 (1.44) | −0.28 (1.85) | 0.19 | 0.82 | −0.01 |
For good sleepers, change scores were computed between T1 and T3. For insomnia symptoms and syndrome incident cases, change scores were computed between baseline and T2 for those who developed difficulties at 6-month follow-up and between baseline and 12-month follow-up for those who developed difficulties at 12-month follow-up.
For those variables, an increment (positive delta) indicates a poorer functioning and a decrement (negative delta) indicates a better functioning.
For the SF-12 subscales, an increment (positive delta) indicates a better functioning and a decrement (negative delta) indicates a poorer functioning.
for those variables, a negative delta indicates a decrement of the event frequency and a positive delta indicates an increment of the event frequency. Note: Means with different subscripts are significantly different on the contrast test.