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Table 3 IDS total score: 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 5.83 1.18 3.50 8.15   < 0.01* 4.60 1.00 2.64 6.56   < 0.01*
HC (reference)             
MDD 23.75 0.92 21.95 25.55 .72 < 0.01* 24.80 0.97 22.90 26.69 .76 < 0.01*
AAD 12.37 0.91 10.58 14.16 .38 < 0.01* 12.36 0.91 10.58 14.15 .38 < 0.01*
MDD + AAD -6.51 1.31 -9.09 -3.94 -.19 < 0.01* -6.63 1.31 -9.19 -4.06 -.19 < 0.01*
Summer (reference)             
Autumn 0.12 0.77 -1.40 1.63 .00 0.88 2.94 1.25 0.48 5.39 .08 0.02*
Winter 1.08 0.82 -0.53 2.70 .03 0.19 6.28 1.50 3.35 9.21 .16 < 0.01*
Spring 0.45 0.82 -1.16 2.07 .01 0.59 2.72 1.37 0.04 5.40 .07 0.05*
Men (reference)             
Women 1.36 0.58 0.21 2.50 .40 0.002* 4.70 1.18 2.38 7.02 .14 < 0.01*
Age 0.03 0.02 -0.01 0.07 .02 0.16       
Two way interactions             
Winter & MDD        -3.74 1.33 -6.35 -1.13 .08 < 0.01*
Autumn & Women        -4.53 1.58 -7.64 -1.43 -.11 < 0.01*
Winter & Women        -5.34 1.68 -8.63 -2.04 -.12 < 0.01*
Spring & Women        -3.72 1.70 -7.07 -0.38 -.08 0.03*
  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 = 0,675
  13. Note: adjusted R2 Full model with seasons, covariates and interactions = 0,680