Table 3 Associations between photoperiod and all depressive symptoms in all participants, females and males.

From: Brainstem volume mediates seasonal variation in depressive symptoms: A cross sectional study in the UK Biobank cohort

 

Model

b (SE)

IRR

p

All participants

Low mood (n = 9289)

−0.015 (0.008)

0.984

0.053

Anhedonia (n = 9289)

−0.013 (0.008)

0.987

0.122

Tenseness (n = 9289)

−0.007 (0.007)

0.993

0.339

Tiredness (n = 9289)

0.002 (0.005)

1.002

0.700

Total depressive score (n = 9289)

−0.005 (0.004)

0.995

0.247

Females

Low mood (n = 4817)

−0.022 (0.010)

0.978

0.038

Anhedonia (n = 4817)

−0.025 (0.011)

0.975

0.033

Tenseness (n = 4817)

−0.014 (0.010)

0.986

0.175

Tiredness (n = 4817)

0.000 (0.007)

1.000

0.980

Total depressive score (n = 4817)

−0.010 (0.006)

0.990

0.111

Males

Low mood (n = 4472)

−0.009 (0.012)

0.991

0.487

Anhedonia (n = 4472)

0.001 (0.012)

1.001

0.920

Tenseness (n = 4472)

0.000 (0.011)

1.000

0.985

Tiredness (n = 4472)

0.003 (0.008)

1.003

0.721

Total depressive score (n = 4472)

−0.001 (0.006)

0.999

0.914

  1. Negative binomial regression coefficients (b), robust standard error (SE) and incidence rate ratios (IRR) for association between photoperiod (corrected for age, ethnicity, living area and Townsend deprivation index) and low mood, anhedonia, tenseness, tiredness and total depressive score. Significant associations (p < 0.05) are shown in bold.
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