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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 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 See also program STAT Growth Charts at See also Cole et al. (1998), Garner et al. (2000), Lindeke (2002), and Dawson (2002).