Table 3.

Mean (95% CI) for CBP, Mean aABP, and the Difference (CBP−aABP) for the Total Sample and Subgroups

nVisit 1 CBPVisits 1–3 CBPaABPCBP−aABP*
Systolic BP
 Full sample888116.1 (115.2 to 116.9)116.0 (115.3 to 116.8)123.0 (122.3 to 123.7)−7.0 (−6.5 to −7.5)
 Sex
  Female525113.4 (112.3 to 114.6)113.2 (112.2 to 114.2)120.5 (119.6 to 121.3)−7.3 (−6.6 to −8.0)
  Male363120.0 (118.7 to 121.2)120.1 (119.1 to 121.2)126.7 (125.7 to 127.7)−6.5 (−5.7 to −7.4)
  Difference6.5 (4.9 to 8.2)7.0 (5.5 to 8.4)6.2 (4.9 to 7.5)0.7 (−0.3 to 1.8)
  P valuet=7.76, P<0.0001t=9.37, P<0.0001t=9.21, P<0.0001t=1.37, P=0.17
 Race
  Nonblack822115.9 (115.0 to 116.8)115.8 (115.0 to 116.6)122.9 (122.1 to 123.6)−7.0 (−6.5 to −7.6)
  Black66118.5 (115.2 to 121.9)118.5 (115.7 to 121.4)124.9 (122.5 to 127.2)−6.3 (−4.5 to −8.2)
  Difference2.6 (−0.6 to 5.9)2.7 (−0.2 to 5.6)2.0 (−0.6 to 4.6)0.7 (−1.3 to 2.7)
  P valuet=1.59, P=0.11t=1.83, P=0.07t=1.53, P=0.13t=0.68, P=0.50
 Ethnicity
  Hispanic107114.9 (112.6 to 117.3)114.4 (112.3 to 116.5)120.6 (118.8 to 122.5)−6.2 (−4.6 to −7.9)
  Non-Hispanic781116.3 (115.3 to 117.2)116.2 (115.4 to 117.1)123.3 (122.6 to 124.1)−7.1 (−6.5 to −7.6)
  Difference1.3 (−1.3 to 3.9)1.9 (−0.5 to 4.2)2.7 (0.6 to 4.8)−0.9 (−2.5 to 0.8)
  P valuet=0.98, P=0.33t=1.55, P=0.12t=2.56, P=0.011t=−1.05, P=0.30
 Body mass index category
  Normal294110.3 (108.9 to 111.7)110.0 (108.8 to 111.2)119.3 (118.1 to 120.4)−9.2 (−8.4 to −10.1)
  Overweight304117.7 (116.4 to 119.1)117.6 (116.4 to 118.8)124.2 (123.1 to 125.3)−6.6 (−5.7 to −7.4)
  Obese239121.6 (120.1 to 123.1)121.8 (120.5 to 123.2)126.6 (125.3 to 127.8)−4.8 (−3.8 to −5.7)
  P valueF=60.29, P<0.0001F=85.07, P<0.0001F=38.69, P<0.0001F=22.99, P<0.0001
Diastolic BP
 Full sample88876.0 (75.4 to 76.6)75.4 (74.9 to 75.9)77.4 (76.9 to 77.9)−2.0 (−1.5 to −2.4)
 Sex
  Female52573.9 (73.2 to 74.7)73.4 (72.7 to 74.0)75.7 (75.1 to 76.3)−2.3 (−1.7 to −2.9)
  Male36378.9 (78.0 to 79.8)78.4 (77.7 to 79.2)79.9 (79.1 to 80.6)−1.5 (−0.8 to −2.1)
  Difference5.0 (3.8 to 6.1)5.0 (4.1 to 6.0)4.2 (3.2 to 5.1)0.9 (0.0 to 1.7)
  P valuet=8.47, P<0.0001t=10.17, P<0.0001t=8.57, P<0.0001t=1.96, P=0.051
 Race
  Nonblack82275.8 (75.2 to 76.5)75.3 (74.8 to 75.8)77.3 (76.8 to 77.8)−2.0 (−1.6 to −2.5)
  Black6677.7 (75.7 to 79.7)77.0 (75.3 to 78.7)78.2 (76.5 to 79.9)−1.2 (−2.8 to 0.5)
  Difference1.9 (−0.4 to 4.1)1.7 (−0.2 to 3.6)0.9 (−1.0 to 2.7)0.8 (−0.8 to 2.5)
   P valuet=1.64, P=0.10t=1.71, P=0.09t=0.89, P=0.37t=1.00, P=0.32
 Ethnicity
  Hispanic10775.5 (73.7 to 77.3)74.4 (72.9 to 75.9)76.8 (75.5 to 78.1)−2.4 (−1.2 to −3.5)
  Non-Hispanic78176.0 (75.4 to 76.7)75.6 (75.0 to 76.1)77.5 (77.0 to 78.0)−1.9 (−1.4 to −2.4)
  Difference0.5 (−1.3 to 2.3)1.2 (−0.4 to 2.7)0.7 (−0.8 to 2.2)0.5 (−0.8 to 1.8)
  P valuet=0.57, P=0.57t=1.46, P=0.14t=0.89, P=0.37t=0.70, P=0.48
 Body mass index category
  Normal29472.1 (71.1 to 73.0)71.6 (70.8 to 72.4)75.9 (75.1 to 76.8)−4.4 (−3.7 to −5.1)
  Overweight30477.5 (76.5 to 78.4)76.7 (75.9 to 77.5)78.9 (78.1 to 79.7)−2.3 (−1.6 to −2.9)
  Obese23979.0 (78.0 to 80.1)78.6 (77.7 to 79.5)77.6 (76.6 to 78.5)1.0 (0.3 to 1.8)
   P valueF=53.18, P<0.0001F=72.66, P<0.0001F=12.45, P<0.0001F=53.11, P<0.0001
  • aABP indicates awake ambulatory blood pressure; BP, blood pressure; and CBP, clinic blood pressure.

  • * CBP−aABP: CBP (mean of 9 readings from 3 visits) minus mean aABP.

  • Normal, <25 kg/m2; overweight, 25 to 29.9 kg/m2; and obese, ≥30 kg/m2.