Table 1 Studies included in the meta-analysis

From: Association of trauma exposure with proinflammatory activity: a transdiagnostic meta-analysis

Study

Total N

Group n (T/NT)

Country

Type of study (Sample name)

Risk of bias a

%F

Age (years) M (s.d.)

Sample type

Biomarkers included

Biomarkers excluded

Spitzer, et al.42

3047

1653/1394

Germany

Population study (SHIP): T/NT

Low

52

54 (15)

Serum

CRP

 

Baumert, et al.43

3012

1224/1788

Germany

Population study (KORA): T/NT

Low

52

56 (13)

Blood, N/S

CRP

IL-18

Cho, et al.44

2716

(Regress.)

USA

Population study (CARDIA): ELA

Low

55

Range 18–30

Plasma

IL-6, CRP

 

O'Donovan, et al.45

979

(Regress.)

USA

Stable CVD: trauma

Low

19

67 (11)

Serum

IL-6, TNF-α, CRP

Resistin

Danese, et al.46

886

315/551

New Zealand

Prospective birth cohort (Dunedin): ELA/no ELA

Low

47

All 32 years

Blood, N/S

CRP, fibrinogen

 

Slopen, et al. (C)28

822

(Regress.)

USA

Population study, subsample (MIDUS)b: ELA

Low

53

59 (12)

Serum

CRP, IL-6, fibrinogen

 

Bertone-Johnson, et al.47

700

452/248

USA

Population study (Nurses' health study): ELA/no ELA

Low

100

44 (5)

Plasma

IL-6, CRP

TNFR2

Rooks, et al.48

482

245/237

USA

Population (VET twin registry)c: high/low ELA

Low

0

55 (3)

Plasma

IL-6, CRP

 

Plantinga, et al.49

476

108/368

USA

Population (VET twin registry)c: PTSD/no PTSD

Low

0

56 (3)

Plasma

Fibrinogen

IL-6, CRPd

Slopen, et al. (AA)28

177

(Regress.)

USA

Population study (AA) (MIDUS+Mke.)e: ELA

Low

67

54 (11)

Serum

CRP, IL-6, fibrinogen

 

Tietjen, et al.50

141

90/51

USA

Migraine patients (+HC): ELA/no ELA

Moderate

100

33 (7)

Blood, N/S

CRP, IL-6, TNF-α

Adiponectin, TGF-β

Smith, et al.51

138

95/43

USA

Primary care/GYN: 35 ELA+PTSD; 31 PTSD−ELA; 29 HC+ELA; 43 NTC

Moderate

50

46 (11)

Plasma

IL-1β,IL-2, IL-4, IL-6, IL-10, TNF-α

IFN-α

Blackmore, et al.52

137

50/80

USA

Pregnant women: T/NT

Low

100

25 (4)

Serum

IL-6, TNF-α

 

Gouin, et al.53

130

57/73

USA

Dementia caregivers: ELA/no ELA

High

82

65 (13)

Serum

IL-6, TNF-α, CRP

 

Guo, et al.54

100

50/50

China

PTSD/NTC

High

53

42 (13)

Serum

IL-2, IL-4, IL-6, IL-8, IL-10, TNF-α

 

Carpenter, et al.55

92

21/71

USA

ELA/no ELA

Moderate

51

31 (9)

Plasma

CRP

 

Gill, et al.56

77

53/24

USA

26 PTSD, current; 27 PTSD, recovery; 24 NTC

Low

100

34 (8)

Plasma

IL-6, CRP

 

Danielson, et al.57

75

40/35

Canada

Undergraduate students: current IPV/no current IPV

Moderate

100

20 (2)

Plasma

IL-6, IL-10

 

Cankaya, et al.58

75

64/11

USA

Primary care: traumatic lossf/no loss

Low

100

≥40

Serum

IL-6

IGF-1

Dennison, et al.59

72

24/48

Ireland

Schizophrenia: 24 PSY+ELA; 16 PSY−ELA; 32 NTC

High

54

37 (10)

Plasma

IL-1β, IL-6, IL-8, TNF-α

 

Tucker, et al.60

68

54/14

USA

Hurricane or mixed trauma: T/NT

High

35

36 (12)

Serum

IL-2, IL-6

 

Hepgul, et al.61

63

25/38

UK

First episode psychosis: 10 PSY+ELA; 15 HC+ELA; 18 PSY−ELA; 20 HC−ELA

High

29

27 (2)

Plasma

CRP

 

Cohen, et al.62

61

48/13

Israel

Prospective musculoskeletal injury: injured/NTC

Moderate

28

35 (13)

Serum

IL-4, IL-6, IL-8, IL-10

TGF-β

Gola, et al.63

60

22/25

Germany

PTSD±MDD/HC

Low

55

31 (10)

Plasma

IL-6, IL-8, IL-10, TNF-α

MCP-1

Hoge, et al.64

56

28/28

USA

PTSD/HC

Moderate

50

41 (11)

Plasma

IL-1β, IL-2, IL-4, IL-6, IL-7, IL-8, IL-10, TNF-α

IL-1α, IL-5, IL-7, IL-13, IL-15, IFN-γ, IP-10+others

Grassi-Oliveira, et al.32

49

30/19 (Regress.)

Brazil

MDD outpatients/HC: ELA regress.

Moderate

100

38 (8)

Plasma

TNF-α

TNFR1, TNFR2

Maes, et al.65

45

13/32

Belgium

PTSD/HC

High

80

46 (8)

Serum

IL-6

sIL-6r, sIL-1RA

Janusek, et al.66

40

(ELA regress.)

USA

Breast cancer

Low

100

56 (9)

Plasma

IL-6

 

Symes, et al.67

39

25/14

USA

CVD: IPV/no IPV

High

100

57 (NR)

Serum

IL-6, CRP, TNF-α

 

Spivak, et al.68

38

19/19

Israel

PTSD/HC

Moderate

0

29 (11)

Serum

IL-1β

sIL-2r

Gill, et al.69

36

22/14

USA

PTSD±MDD/NTC

Moderate

42

36 (12)

Plasma

IL-6

 

Groer, et al.70

31

15/16

USA

Sexual assault crisis center: raped/HC

Moderate

100

Range 18–51

Serum

IL-6 IL-10, CRP

IFN-γ

Pace, et al.71

28

14/14

USA

MDD+ELA/NTC

Moderate

0

30 (9)

Plasma

IL-6

 

Bonne, et al.72

26

15/11

USA

PTSD/NTC

Moderate

73

36 (12)

CSF

IL-6

IGF-1

Baker, et al.73

19

11/8

USA

PTSD/HC

High

0

42 (9)

Plasma

IL-6

 
  1. Abbreviations: Blood, N/S, blood, not otherwise specified; ELA, early life adversity/childhood trauma; HC, healthy controls, not otherwise specified; IPV, intimate partner violence; MDD, major depressive disorder; N/S, not specified; NT, non-trauma exposed; NTC, non-trauma-exposed controls; primary care/GYN, recruited from primary care or gynecology clinics; PSY, psychosis; PTSD, posttraumatic stress disorder; regress., regression model (continuous outcome); T, trauma exposed; TC, trauma-exposed controls.
  2. aRisk of bias is based on the modified QAT.41 Overall risk of bias is based on selection bias, study design, percent of recommended covariates controlled,22 use of reliable and valid assessments and use of appropriate statistical analyses.
  3. bCaucasian subsample.
  4. cBased on analysis of individuals (not twin pairs) and had been described in original study as statistically corrected for clustering.
  5. dSubsample of Rooks et al.,49 so overlapping biomarkers were not included.
  6. eAfrican American subsample: comprised of MIDUS and Milwaukee (Mke.) samples.
  7. fSudden loss, as defined by TLEQ.74