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Table 1 Clinical and laboratory findings in patients with rheumatoid arthritis and controls

From: Impact of disease activity on impaired glucose metabolism in patients with rheumatoid arthritis

Clinical and laboratory features

RA patients (N = 90)

Controls (N = 37)

P

Age (years)

52.4 ± 9.9

49.0 ± 7.5

ns

Females, n (%)

78/90 (86.7)

29/37 (78.4)

ns

BMI (kg/m2)

25.7 ± 4.3

26.2 ± 4.3

ns

BMI > 25 kg/m2, n (%)

48/90 (53.3)

19/37 (51.4)

ns

Hypertension, n (%)

28/90 (31.1)

8/37 (21.6)

ns

WC (cm)

86.9 ± 12.3

86.2 ± 11.5

ns

Increased WCa, n (%)

34/90 (37.8)

10/37 (27.0)

ns

Waist-to-hip ratio

0.84 ± 0.08

0.83 ± 0.08

ns

Metabolic syndrome, n (%)

19/90 (21.1)

5/37 (13.5)

ns

ESR (mm/h)

29.5 (14–44)

16.0 (10.0–20.0)

0.000

CRP (mg/l)

5.5 (2.8–15)

2.5 (1.8–3.9)

0.000

IL-6 (pg/ml)

7.4 (2.0–18.8)

2.0 (2.0–2.4)

0.000

MMP3 (ng/ml)

185 (90–341)

68 (58–99)

0.000

Total cholesterol (mmol/l)

5.2 ± 1.3

5.5 ± 0.8

ns

TGL (mmol/l)

1.2 (0.8–1.5)

1.02 (0.84–1.38)

ns

Blood glucose (mmol/l)

4.8 ± 0.6

4.7 ± 0.8

ns

Insulin (pmol/l)

68.5 (50.2–102.7)

55.3 (36.0–69.1)

0.008

C-peptide (pmol/l)

785 (520–1010)

600 (450–880)

0.046

HOMA2-IR

1.4 (1.0–2.3)

1.2 (0.8–1.4)

0.008

HOMA2-IR > 1, n (%)

67/90 (74.4)

20/37 (54.1)

0.025

HOMA2-%S

70 (46–100)

84 (71.0–132)

0.010

HOMA2-%B

148 (116–190)

141 (114–158)

ns

Proinsulinb (pmol/l)

3.9 (2.9/5.4)

2.9 (2.0/3.8)

0.032

SJC

7 (4–12)

  

TJC

3.5 (0–7)

  

Patient’s global assessment (VAS, mm)

50 (30–60)

  

HAQ

0.6 (0.3–0.9)

  

DAS28-ESR

4.8 ± 1.5

  

DAS28-ESR ≥ 5.1, n (%)

46/90 (51.1)

  

DAS28-ESR ≤ 3.2, n (%)

20/90 (22.2)

  

DAS 28-CRP

4.2 ± 1.5

  

Patients treated with GC, n (%)

59/90 (65.6)

  

GC, average daily doses (mg/day)

5 (5–10)

  

Duration of GC therapy (years)

4 (2–6)

  

DMARD c, n (%)

90/90 (100%)

  

Patients on biologic drugs, n (%)

25/90 (27.8)

  

Rheumatoid factor positive (%)

53/90 (58.9)

  

Anti-CCP positive (%)

63/90 (70.0)

  
  1. Data are presented as mean values ± SD or the median and interquartile range (IQR) or percentages. Two-tailed level of P < 0.05 was considered statistically significant and marked in bold
  2. Abbreviations: BMI body mass index, CCP cyclic citrullinated peptide, CRP C-reactive protein, DAS28 disease activity score of 28 joints, DMARD disease-modifying anti-rheumatic drugs, ESR erythrocyte sedimentation rate, GC glucocorticoids, HAQ Health Assessment Questionnaire, HOMA2-%B Homeostasis Model Assessment of beta cell function, HOMA2-IR Homeostasis Model Assessment of insulin resistance, HOMA2-%S Homeostasis Model Assessment of insulin sensitivity, IL interleukin, MMP3 matrix metalloproteinase-3, SJC number of swollen joints, TGL triglycerides, TJC number of tender joints, VAS visual analogue scale (0–100 mm), WC waist circumference
  3. aIncreased waist circumference was defined as > 102 cm in men and > 88 cm in women. bProinsulin was measured in 1/3 of the participants. cOut of 90 patients treated with DMARDs, 84/90 (93.3%) were treated with methotrexate (MTX). Out of them, 38/84 (45.2%) had been receiving MTX in combination with chloroquine. Only ten patients (11.1%) received sulfasalazine or leflunomide