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Table 2 Demographic characteristics and health status of the study population

From: Acute effects of fine particulate air pollution on ST segment height: A longitudinal study

Characteristic All subjects Hypertension, Diabetes, or CVD
   No Yes P value
  N = 106 N = 60 N = 46  
Age 56.2 (7.6) 55.6 (8.2) 57.1 (6.8) 0.30
Gender (% Male) 40.6 40.0 41.3 0.89
Race (% White) 73.6 71.7 76.1 0.61
Glucose (mg/dL) 88.8 (25.1) 84.6 (10.0) 94.3 (36.0) 0.09
BMI (kg/m2) 27.7 (5.9) 26.2 (4.3) 29.7 (7.0) <0.01
CVD (%) 8.5 0.0 19.6 <0.01
Hypertension (%) 34.9 0.0 84.8 <0.01
Diabetes (%) 7.6 0.0 17.4 <0.01
Systolic BP(mm Hg) 121.9 (15.7) 117.1 (11.9) 128.2 (17.9) <0.01
Diastolic BP (mm Hg) 75.1 (9.2) 73.1 (8.3) 77.6 (9.8) 0.01
College or higher (%) 78.3 73.3 84.8 0.16
Inferior Leads     
   ST-II (μV) 35.4 (38.0) 40.7 (38.0) 28.5 (7.0) <0.01
   ST-III (μV) 19.4 (30.6) 22.5 (31.8) 15.4 (28.5) <0.01
   ST-aVF (μV) 27.4 (33.5) 31.6(34.2) 22.0 (31.7) <0.01
Lateral Leads     
   ST-I (μV) 15.5 (17.1) 17.8 (15.3) 12.6 (18.9) <0.01
   ST-V5 (μV) 46.8 (48.6) 55.0 (50.7) 36.1 (43.5) <0.01
   ST-V6 (μV) 28.2 (37.7) 34.4 (38.5) 20.1 (25.3) <0.01
Septal Leads     
   ST-V1 (μV) 40.9 (31.9) 41.4 (33.2) 40.4 (30.1) 0.29
   ST-V2 (μV) 90.64 (56.09) 94.3 (56.0) 86.0 (55.9) <0.01
Anterior Leads     
   ST-V3 (μV) 91.8 (65.5) 100.3 (71.3) 80.8 (55.2) <0.01
   ST-V4 (μV) 72.5 (56.8) 81.7 (58.5) 60.7 (52.4) <0.01
PM2.5(μg/m3) 13.6 (21.6) 11.9 (14.7) 15.9 (28.0) <0.01
Temperature (°C) 21.8 (3.5) 21.8 (3.7) 21.7 (3.4) 0.04
Relative humidity (%) 39.7 (12.1) 40.2 (12.3) 39.0 (11.8) <0.01
  1. Results are presented as mean (SD) for continuous variables and percentage for categorical variables.