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Table 1 Demographic and clinical characteristics among CWP cases and controls

From: Cross-section analysis of coal workers’ pneumoconiosis and higher brachial-ankle pulse wave velocity within Kailuan study

  CPW Controls P
N 1007 1007  
Age (Years) 65.15 ± 8.86 65.07 ± 8.82 0.853
Current smoking, n (%) 339 (33.7) 469(46.6) <0.001
Body Mass Index (kg/m2) 25.41 ± 3.46 25.10 ± 3.97 0.134
Systolic Blood Pressure (mmHg) 138.78 ± 18.78 138.23 ± 18.94 0.508
Diastolic Blood Pressure (mmHg) 85.63 ± 10.91 84.84 ± 11.04 0.108
Heart rate (beats/min) 75.62 ± 16.39 71.31 ± 11.28 <0.001
Fasting Plasma Glucose (mmol/L) 5.89 ± 1.74 5.68 ± 1.39 0.003
Total Cholesterol (mmol/L) 4.91 ± 0.98 5.07 ± 1.00 <0.001
Low-Density Lipoprotein-Cholesterol (mmol/L) 2.64 ± 0.93 2.67 ± 1.00 0.640
High-Density Lipoprotein - Cholesterol (mmol/L) 1.52 ± 0.48 1.60 ± 1.06 0.033
Triglycerides (mmol/L)a 1.35 (1.02,1.81) 1.20 (0.86,1.70) <0.001
Hypertensionb, n (%) 612 (60.8) 612(60.8) 0.646
Diabetes mellitusc, n (%) 141(14.0) 111(11.0) 0.051
Stage
 I 980 (97.3) -  
 II 22 (2.2) -  
 III 5 (0.5) -  
Duration of silica dust exposure (years)
  < 20 194 (19.3)   
 20 ~ 29 447 (44.4)   
  ≥ 30 366 (36.3)   
 Cumulative silica dust exposure (mg/m3-y) 1059.02 ± 458 -  
 baPWV cm/s 1762.0 ± 355 1718.6 ± 354 0.006
 baPWV ≥ 1687 cm/s, n (%) 533 (52.9) 478(47.5) 0.016
  1. CWP indicates coal workers’ pneumoconiosis; baPWV, brachial-ankle pulse wave velocity
  2. aStudent’s t-test was used after log transformation
  3. bBe defined as having the history of hypertension or SBP ≥ 140 mmHg or DBP ≥ 90 mmHg measured at the examination
  4. cBe defined as having the history of diabetes mellitus or fasting blood glucose ≥ 7.0 mmol/L measured at the examination