Table 1.
Contrast between DSPS and controls.
| DSPS (n=327) | Controls (n=331) | |||
|---|---|---|---|---|
| Sex (male/female) | 90/237 | 110/221 | X2=2.54 | p=0.11 |
| Age (yrs) | 37.37±11.13 | 38.31±12.68 | t=−1.00 | p=0.32 |
| Horne Östberg score | 25.40±5.73 | 55.56±10.77 | t=−44.91 | p<0.001 |
| BALM | 17.86±4.11 | 38.28±7.96 | t=−41.44 | p<0.001 |
| QIDS-SR | 5.72±3.90 | 3.75±3.37 | t=6.94 | p<0.001 |
| MDQ | 3.66±3.81 | 3.36±3.60 | t=1.02 | p=0.31 |
| SPAQ | ||||
| Global Seasonality Score | 5.48±4.90 | 4.71±4.23 | t=2.15 | p=0.032 |
| Sleep length seasonality | 0.79±1.01 | 0.67±0.97 | t=1.53 | p=0.13 |
| Social activity seasonality | 1.07±1.15 | 1.00±1.03 | t=0.83 | p=0.41 |
| Mood seasonality | 1.16±1.16 | 0.90±1.01 | t=3.12 | p=0.002 |
| Weight seasonality | 0.67±0.89 | 0.65±0.82 | t=0.35 | p=0.73 |
| Appetite seasonality | 0.66±0.90 | 0.50±1.09 | t=2.04 | p=0.041 |
| Energy level seasonality | 1.12±1.11 | 0.91±0.95 | t=2.64 | p=0.008 |
| Problem Severity of Seasonality | 0.61±1.06 | 0.30±0.72 | t=4.50 | p<0.001 |
| Seasonal weight fluctuation* | 2.28±1.21 | 1.85±0.94 | t=5.16 | p<0.001 |
| Sleep duration-winter (hrs) | 8.18±1.95 | 7.94±1.35 | t=1.88 | p=0.061 |
| Sleep duration-spring (hrs) | 7.57±1.70 | 7.54±1.25 | t=0.26 | p=0.80 |
| Sleep duration-summer (hrs) | 7.43±1.71 | 7.44±1.30 | t=−0.072 | p=0.94 |
| Sleep duration-fall (hrs) | 7.73±1.66 | 7.68±1.29 | t=0.46 | p=0.65 |
| Sleep duration difference (winter – summer) (hrs) | 0.75±1.37 | 0.50±1.05 | t=2.64 | p=0.009 |
| Food preference change (yes/no) | 121/206 | 127/204 | X2=0.13 | p=0.72 |
SPAQ, Seasonal Pattern Assessment Questionnaire; BALM, Basic Language Morningness Scale; QIDS-SR, Quick Inventory of Depression Symptomatology-Self Report; MDQ, Mood Disorders Questionnaire
*
1, 0–3 lbs; 2, 4–7 lbs; 3, 8–11 lbs; 4, 12–15 lbs; 5, 16–20 lbs; 6, Over 20 lbs