Table 2—

Age-adjusted means for components of the IRS and summary IRS score by neighborhood categories: the CARDIA study 1995–1996

BMI (kg/m2)HDL cholesterol (mg/dl)Triglycerides (mg/dl)Fasting insulin (μU/ml)Fasting glucose (mg/dl)Systolic blood pressureIRS score
Quartiles of neighborhood score (median score)
 White men (n = 782)
  Q1 (−0.40)27.441.9131.814.589.1111.60.44
  Q2 (3.1)26.042.5119.312.287.2110.90.21
  Q3 (6.5)26.643.5116.211.788.6111.50.27
  Q4 (10.6)25.944.2103.512.188.7111.20.20
  P trend0.0030.030.0040.0020.90.90.02
 White women (n = 852)
  Q1 (−0.40)27.651.895.012.385.1103.4−0.18
  Q2 (3.1)25.753.983.011.383.1104.1−0.44
  Q3 (6.5)25.055.878.010.783.2103.2−0.56
  Q4 (10.6)23.258.273.39.682.5101.7−0.80
  P trend<0.0001<0.0001<0.0001<0.00010.00080.04<0.0001
 Black men (n = 599)
  Q1 (−5.4)27.948.887.314.586.9113.80.18
  Q2 (−2.1)27.451.294.914.987.7114.90.20
  Q3 (0.73)28.446.796.915.189.4117.00.47
  Q4 (5.0)27.546.9100.614.189.1115.30.33
  P trend0.90.050.10.70.010.10.05
 Black women (n = 860)
  Q1 (−5.4)30.352.576.716.084.6111.80.11
  Q2 (−2.1)30.552.570.915.884.4111.00.07
  Q3 (0.73)30.153.969.916.286.1110.80.08
  Q4 (5.0)28.954.166.813.785.0108.1−0.15
  P trend0.060.10.010.020.30.010.01
  • Quartiles are race-specific. Median corresponds to the median value for each category. P values for linear trends across categories were investigated by including the four categories as ordinal variables in regression equations (i.e., assigning score values 1–4 to the four categories).