DOCUMENT SOURCE
University of California at Berkeley
The Bancron Library/The University Archives, Berkeley CA
AECCADS SERIES TITLE
Kenneth
BANCACFTIUARC ID NO.
Fepers
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RED CELL AND BLOOD VOLUME IN HEALTHY MEN: C™
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Revation or Heicat anpWeicut To Hemarocnit
Each subject is plotted according to height and weight as in Figure 1. The il men
with the lowest hematocrits, 41.1 per cent or below and represented by A. appear. .
mostly in the left upper area. The 10 men with the highest hematocrits, 49.5 per cent
or above and represented by ©, appear mostly-m the right lower area.
7
oy
,
ee
provided a meansof testing the influence on blood
volume of factors other than weight and height
when considered independently. The predicted
Vrbe and Vpl of each subject were calculated,
using Equations 3 and 7, Table If. Each sub.
of subjects in the highest
age
age group—
TABLE tl;
Influence of age on Vrde and U'pt
Age
years
Number
of men
19-24
25-29
42
16 7
45-52
5
30-34
35-39
40-44
45
22
11
* Standard error.
Residuals Vrbc
_—_
Mean
Ss. E.#
mi.
18
15
4
10
44
238
Residuals Vol
—<$—$—
Mean
Ss E
ml
mi.
28
41
57
-1i1
22
83
29
22
B5
if
—§
42
ml.
at
27
35
51
72
105
‘,
C
largest number of meg_were in theirsthird an
(Tasha fore
te
fa
Fo
fourth decades; a few wereover 40. Comparison:
of mean residuals withTHéif standard errors indicates that age haslittle-eftect, except on the Vrbe
2. Influence of factors other than height and
weight as shown by analysis of “residuals”
Analysis of the differences between the observed volumes in each subject and the average
volumes for his height and weight, t.z., “restduals,”
“Oo.
A positive correlation was found between residu- 7
als for Vrbc and Vpl (r= +042). 2 ~
A) Age. Table II] shows the distributio
ort
ages and the mean residuals for Vrbeand ¥ptof
the subjects within each five vear age group= fhe
writer trom Pe Pare
The regression plane for
Vpl (Equation 7, Table II) is represented by the
dotted contour lines. The contour lines for
Vrbe are steeper than those for Vpl, indicating
that Vrbc is relatively more dependent on weight
than height, whereas the reverse is true of Vol.
Although the differences are small, the hematocrits
of short, heavy men tend to be slightly higher than
those of tall, thin men. as shown in Figure 2.
volumes.
reporter va
corner of the chart.
ject’s residual Vrbe and Vpl were then fonnd by _ subtracting“his predicted from hrs vobserved ~
ByAc oo Sap
according to his height and weight. The location
oi the regression plane for Vrbe in relation to
combined height and weight (Equation 3. Table
II) is represented by the solid contour lines progressing from the leit lower to the mght upper