Table 1 Main variables of interest in the two cohorts.

From: Association of inflammation with depression and anxiety: evidence for symptom-specificity and potential causality from UK Biobank and NESDA cohorts

 

UK Biobank

NESDA

 

N = 143,465

N = 2,905

Sociodemographics

  

  Age years (mean ± SD)

55.9 (7.7)

41.9 (13.1)

  Sex (F) (%)

56.2

66.5

Symptom endorsement - Depression (%)

  

  D.1 Anhedonia

18.5

13.9

  D.2 Depressed mood

21.9

21.6

   D.3 Sleep problem

48.7

25.9

  D.4 Fatigues

49.9

36.5

  D.5 Appetite change

18.2

7.7

  D.6 Feelings of inadequacy

19.2

24.2

  D.7 Cognitive problems

17.9

21.9

  D.8 Psychomotor change

5.5

18.1

   D.9 Suicidal ideation

4.3

12.2

Symptom summary scales

  

  Psychological symptoms (mean ± SD)

0.74 (1.51)

0.721 (1.04)

  Somatic symptoms (mean ± SD)

1.65 (2.03)

1.09 (1.30)

Symptom endorsement - Anxiety (%)

  

  A.1 Anxiety

28.0

24.5

  A.2 Worrying control

23.4

24.8

  A.3 Generalised worrying

31.6

31.5

  A.4 Lack of relaxation

28.3

32.3

  A.5 Restlessness

11.8

25.7

  A.6 Irritability

27.2

21.0

  A.7 Foreboding

16.6

20.4

Inflammatory markers

  

  CRP (mg/L) (median, IQR)

1.15 (0.58–2.37)

1.22 (054–3.00)

  IL-6 (pg/mL) (median, IQR)

NA

0.75 (0.49–1.25)

  1. UK Biobank sample size reflects all individuals with complete symptom and CRP data. For NESDA baseline values are reported; measures at 2- and 6-year follow-up are reported in Supplementary Table 5, Supplementary Figs. 1 and 2.
  2. NA not applicable.