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Table 1 Baseline characteristics of study population according to IL8 quartiles

From: Serum IL8 is not associated with cardiovascular events but with all-cause mortality

  IL8 Q1
(IL8 ≤ 8.7 pg/ml)
IL8 Q2
(IL8 > 8.7 ≤ 11.9 pg/ml)
IL8 Q3
(IL8 > 11.9 ≤ 17.3 pg/ml)
IL8 Q4
(IL8 > 17.3 pg/ml)
Male/Female 438/563 426/576 482/522 595/409
SBP (mmHg) 134 (121–150) 137 (122–152) 136 (123–152) 137 (123–152)
DBP (mmHg) 83 (76–90) 83 (76–91) 83 (76–91) 84 (77–91)
Anthropometric measures
 BMI(kg/cm2) 26 (24–29) 26 (24–29) 26 (24–29) 26 (24–29)
 Waist/hip ratio 0.8 (0.8–0.9) 0.8 (0.8–0.9) 0.9 (0.8–0.9) 0.9 (0.8–1.0)
Life style factors (%)
 Physical activity at work
  Low 312 (24) 321 (25) 338 (26) 312 (24)
  Medium 212 (24) 225 (25) 213 (24) 225 (25)
  Medium high 227 (24) 236 (25) 230 (25) 233 (25)
  High 210 (24) 205 (24) 220 (26) 209 (25)
 Physical activity during leisure time
  Low 100 (22) 123 (27) 111 (24) 121 (27)
  Medium 594 (26) 569 (25) 570 (25) 565 (25)
  Medium high 220 (24) 225 (25) 239 (26) 220 (24)
  High 62 (21) 75 (25) 85 (28) 73 (25)
 Alcohol consumption (g/day) 7.8 (2.2–15.2) 8.0 (2.2–17.6) 8.1 (2.7–16.8) 10.2 (4.2–21.1)
Cardiovascular risk factors (%)
 Smoking 530 (22) 594 (25) 608 (25) 647 (27)
 Diabetes 19 (14) 36 (26) 41 (30) 43 (31)
 Hypertension 193 (24) 181 (23) 218 (27) 197 (25)
 Hypercholesterolemia 39 (18) 46 (22) 66 (31) 61 (29)
 Central obesity 487 (23) 505 (24) 539 (25) 585 (27)
Biochemical markers (mmol/L)
 Cholesterol 6.0 (5.3–6.6) 6.0 (5.3–6.7) 6.0 (5.3–6.7) 6.0 (5.3–6.7)
 LDL-cholesterol 3.9 (3.3–4.5) 3.8 (3.3–4.5) 3.9 (3.3–4.5) 3.8 (3.2–4.4)
 Glucose 5.2 (4.8–5.6) 5.2 (4.8–5.6) 5.2 (4.8–5.7) 5.2 (4.9–5.7)
  1. Continuous variables are presented as median and interquartile range. Abbreviations: SBP: systolic blood pressure; DBP: diastolic blood pressure; BMI body mass index, LDL low density lipoproteins, CVE cardiovascular events. Missing values: SBP and DBP, n = 3; waist/hip ratio, n = 2; physical activity at work, n = 83; physical activity leisure time, n = 59; smoking, n = 57; alcohol consumption, n = 1; LDL, n = 47