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Table 3 Inflammatory biomarkers in relationship to clinical features (longitudinal studies)

From: Inflammatory biomarkers in patients with sciatica: a systematic review

Study

Age (yr)

Duration (weeks)

Source

Technique

Substance

Clin O

Ass

Schistad [15]

41.3 (10)

20.3 (19.9)

serum

ELISA

Il-6

VAS

B = 0,64a

Sturmer [23]

44.8 (12.4)

acuteb

serum

latex agl

hsCRP

VAS > 4

aOR = 3,4c

Andrade [24]

49

N

NP Biopsy

mRNA qPCR

TNFa

VAS

r = 0,65

AF Biopsy

mRNA qPCR

TNFa

VAS

r = 0,06

LF Biopsy

mRNA qPCR

TNFa

VAS

r = 0,29

Andrade [25]

41

13–26

NP Biopsy

mRNA qPCR

IL-6

VAS

r = 0,23

NP Biopsy

mRNA qPCR

IL-1b

VAS

r = 0,05

NP Biopsy

mRNA qPCR

IL-6

VAS

r = −0,11

NP Biopsy

mRNA qPCR

IL-1b

VAS

r = 0,03

Pedersen [26]

39.3 (18–58)

32.3 + − 4.5

serum

ELISA

IL-6

VAS

F(1.0, 118) = 9,7

serum

ELISA

IL-8

VAS

F(1.0, 118,0) = 6,9

Wang [27]

37 + −13.3)d

48 (+ − 29)

serum

ELISA

IL-6

ODI

r = 0,394

serum

ELISA

TNFa

ODI

r = 0,629

serum

ELISA

IL-10

ODI

r = 0,415

serum

ELISA

IL-8

ODI

r = −0,133

Moen [28]

40 (9)

> 8

serum

PEA

inflammation score

VAS

positive Linear discriminant analysis

Zu [29]

34.0 + −12.3e

48 (+ − 29)c

serum

ELISA

TNFa

ODI + VAS > 3

r = 0,2

serum

ELISA

TNFa

ODI + VAS < 3

r = 0,37

serum

ELISA

IL-4

ODI + VAS > 3

r = 0,09

serum

ELISA

IL-4

ODI + VAS < 3

r = 0,08

Chen [30]

51.3 + −24.4

N

NP biopsy

Western blot

IL-21

VAS

r = 0.834

  1. AF annulus fibrosus, aOR adjusted Odds Ratio, Ass association, Clin O clinical outcome, LF ligamentum flavum, ELISA enzyme linked immune assay, hsCRP high sensitive c-reactive protein, Il interleukin, latex agl latex agglutination, mRNA messenger RNA, N unknown, NP nucleus pulposus, ODI Oswesty Disability Index, PEA proximal extension assay, TNF tumour necrosis factor alpha, Yr years, VAS visual analogue scale
  2. amultivariate regression analysis
  3. bno definition
  4. cadjusted for age, sex, smoking, alcohol, body mass, use of diuretics and analgetic drugs and steroid injections during the previous 24 h
  5. dhigh pain group (VAS > 3)
  6. esubgroup ruptured AF