 |
These equations
have 8-20 years of age on the x axis, and on the y axis HT in 128.8-169.4 cm
for boys and 128.5-157.3 cm for girls. Ranges of averages for WT were
28.5-68.8 kg for boys and 28.6-60.0 kg. From 16-20 years, the forced vital
capacity (FVC) in liters for boys was 4.9-5.1 and forced expulsory volume in
1 second (FEV1) in liters was 4.4-4.5. For girls, these ranges were 3.6-3.9
FVC and 3.3-354 FEV1. Then FEV1/FVC % for boys is 89, and for girls 91 FEV1/FVC
%. However, these pulmonary variables are indirectly derived from HT, not
measured. For both genders, WT = a + b HT3 is a lawlike relation.
HT is predicting lung variables that may not have factual equations.
This kind of work requires results from spirometers factually applied in
schools. Air pollution monitoring including ozone concentrations could
provide a desirable public benefit.
Most of the Mexican growth information can be located
through Internet on
www.insp.mx/salud/index.html.
Papers on Mexican Americans include Zaveleta (1980), Malina & Zaveleta
(1980) and Kautz & Harrison (1981). In May, 2000, the US Centers for Disease
Control and Prevention revised growth charts for 2 to 20 years of age,
including the body mass index (BMI) defined as weight (WT) divided by the
square of height (HT), available at
www.cdc.gov/growthcharts.
See also program STAT Growth Charts at
www.statcoder.com. See also Cole et al.
(1998), Garner et al. (2000),
Lindeke (2002), and Dawson
(2002). |
