Skip to main content

Table 11 Melancholic symptoms of the IDS: regression model with groups, seasons, covariates and full model with interactions

From: Seasonality in depressive and anxiety symptoms among primary care patients and in patients with depressive and anxiety disorders; results from the Netherlands Study of Depression and Anxiety

Main Effects B SE LB UB β p B SE LB UB β p
Intercept 1.62 0.25 1.12 2.12   < 0.01* 1.28 0.28 0.73 1.82   < 0.01*
HC (reference)             
MDD 6.64 0.31 6.03 7.26 .70 < 0.01* 7.46 0.41 6.64 8.27 .79 < 0.01*
AAD 2.94 0.31 2.34 3.54 .31 < 0.01* 2.89 0.31 2.29 3.50 .32 < 0.01*
MDD + AAD -1.69 0.45 -2.56 -0.81 -.17 < 0.01* -1.63 0.45 -2.50 -0.75 -.16 < 0.01*
Summer (reference)             
Autumn 0.20 0.26 -0.31 0.72 .02 0.44 0.23 0.26 -0.28 0.75 .02 0.38
Winter 0.20 0.28 -0.35 0.75 .02 0.47 0.74 0.36 0.03 1.44 .07 0.04*
Spring 0.20 0.28 -0.35 0.74 .02 0.48 0.22 0.28 -0.33 0.76 .02 0.43
Men (reference)             
Women -0.34 0.20 -0.73 0.05 .04 0.09 0.03 0.26 -0.48 0.55 .003 0.90
Two way interactions             
Winter & MDD        -1.06 0.45 -1.95 -0.18 -.07 0.02*
Women & MDD        -0.90 0.40 -1.69 -0.12 -.09 0.02*
  1. IDS = Inventory of Depressive Symptoms
  2. B = Unstandardized Coefficient
  3. SE = standard error of B
  4. LB = Lower Bound of 95% Confidence Interval for B
  5. UB = Upper Bound of 95% Confidence Interval for B
  6. β = Standardized Coefficient
  7. * p < 0.05
  8. HC = Healthy Control
  9. MDD = Major Depressive Disorder
  10. AAD = Any Anxiety Disorder
  11. MDD + AAD = Major Depressive Disorder + Any Anxiety Disorder
  12. Note: adjusted R2 Model with seasons and covariates = 0,577
  13. Note: adjusted R2 Full model with seasons, covariates and interactions = 0,580