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Table 1 Baseline characteristics in relation to quartiles of FEV1%predicted: Males (n = 20,295)

From: The temporal relationship between poor lung function and the risk of diabetes

  Overall Q4 Q3 Q2 Q1 P value for trend
FEV1%predicted 95.4 (±17.7) 117.0 (±9.9) 100.7 (±3.1) 90.3 (±3.2) 73.3 (±11.3)
Number (n) 20,295 5074 5074 5074 5073
Age (years) 43.4 (±6.6) 43.9 (±6.5) 42.9 (±6.6) 42.8 (±6.6) 44.0 (±6.7) 0.350
Height (m) 1.77 (±0.07) 1.77 (±0.07) 1.77 (±0.07) 1.77 (±0.07) 1.77 (±0.07) 0.820
Current-smokers (%) 49.1 35.8 43.4 53.5 63.8 <0.001
BMI (kg/m2) 24.6 (±3.2) 24.4 (±2.9) 24.5 (±3.1) 24.5 (±3.2) 24.8 (±3.6) <0.001
Physical inactivity (%) 52.4 45.9 50.4 54.6 58.6 <0.001
Anti-hypertensive medication (%) 3.7 3.0 3.5 3.5 4.7 <0.001
High alcohol consumption (%) 17.8 15.6 16.8 18.7 20.1 <0.001
ESR (mm/h)a 4.05 3.86 3.90 4.01 4.46 <0.001
Baseline glucose (mmol/L) 4.93 (±0.50) 4.89 (±0.49) 4.94 (±0.51) 4.94 (±0.50) 4.94 (±0.52) <0.001
Cholesterol (mmol/L) 5.59 (±1.05) 5.52 (±1.01) 5.56 (±1.03) 5.60 (±1.06) 5.66 (±1.08) <0.001
Family history of diabetes (%) 11.0 11.4 10.1 10.8 11.8 0.371
Social class (%)       0.125
 - Low skilled 44.9 42.5 42.6 45.8 48.8
 - High skilled 43.9 47.1 47.3 42.3 38.8
 - Self-employed 8.3 8.0 8.0 9.0 8.0
 - Other 3.0 2.5 2.5 2.9 4.5
  1. Q Quartile, FEV 1 Forced expiratory volume 1 s, BMI body mass index, ESR Erythrocyte sedimentation rate. Data consist of mean (±standard deviation) unless otherwise stated. aGeometric mean presented for ESR. Linear by linear association for chi square tests used for p value for categorical variables, ANOVA test for linearity used for p value for continuous variables