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Table 1 Characteristics of 242 young-adult women in the Richmond, CA cohort of the NHLBI Growth and Health Study, 1996–1997.

From: Vitamin C in plasma is inversely related to blood pressure and change in blood pressure during the previous year in young Black and White women

  All
(n = 242)
Blacks
(n = 155)
Whites
(n = 87)
 
  Mean SD Mean SD Mean SD p*
Systolic BP (mmHg) 109.8 10.3 111.1 10.8 107.4 9.0 0.007
Diastolic BP (mmHg) 66.9 9.0 67.4 9.0 66.1 9.0 0.31
Plasma vitamin C (mg/dL) 1.2 0.5 1.2 0.4 1.2 0.6 0.34
Age (yr) 19.1 0.6 19.2 0.7 19.1 0.6 0.28
Weight (kg) 70.9 19.3 71.2 19.3 70.4 19.3 0.74
BMI (kg/m2) 26.1 6.7 26.4 6.6 25.7 6.9 0.40
Television or video watching (hr/wk) 32.0 24.1 39.3 23.9 19.0 18.4 < 0.0001
Household income ($) 20,000–29,999   10,000–19,999   30,000–39,999   < 0.0001
Total energy intake (kcal/d) 1919.6 787.2 1985.8 827.7 1809.9 706.4 0.11
Total fat intake (gm/d) 74.1 36.8 79.3 36.2 65.5 36.2 0.006
Dietary vitamin C intake (mg/d)**
Mean (median, 25th75th%ile)
121.7
(79.3)
176.6
(38.9, 128.2)
128.1
(80.0)
203.4
(43.4, 126.1)
111.1
(63.5)
120.3
(31.0, 136.5)
0.43
  1. * P-values pertain to comparison between Blacks and Whites.
  2. Multiply by 56.8 to convert to SI units, μmol/L
  3. ‡ Household income values are the categories in which the median fell.
  4. ** Values in parentheses represent median (in the Means column) and 25th/75th percentiles (in the Standard Deviations column)