ExtractIn a previous publication we predicted that growth as measured by ' OK is best described by comparison of the semilog function of total body potassium (TBK) vs. length with a slope that differs in infants from that of children aged 3-18 years. Data for 84 infants having three or more measurements during the first year of life attest to this hypothesis, with a regression line for TBK and length: log, K, g = -0.265 + 0.04112 length in centimeters. SpeculationThe increasing rate of ' OK accumulation between birth and the age of 1-2 years is compatible with the hypothesis that changes of body composition from that of the neonate to that of the adult is a steady process and that it is completed by the time the infant reaches a length of about 90 cm. This process is independent of sex and initial feeding within the conditions of this study. Further methodology refinements will be needed to determine the events occurring in low birth weight infants. The role of protein-calorie malnutrition in this process warrants study.In a previous publication (5) we predicted that growth as measured by ' OK is best described by comparison of the semilog function of total body potassium (TBK) vs. length with a slope that differs in infants from that of children aged 3-18 years.In this longitudinal study we have attempted to document that prediction by measuring total body potassium in the first 1.5 years in 84 normal infants who grew within the 16th and 84th percentiles of the Iowa Growth Charts. The relationship between TBK and height (or length) has been well established by several investigators (3,5,7,13,15,16). The uniqueness of this study is its assessment of the effects of type of feeding during the study and its attempt to delineate sex-related differences within two feeding regimens. SUBJECTS A N D METHODSFrom body composition studies of 153 normal, healthy term infants recruited with informed consent of their parents, and receiving care from the University of Missouri Medical Center and community pediatricians, 84 infants had three or more measurements of TBK, length, and weight and therefore qualified for a statistical analysis of their longitudinal data. Approximately half of the babies were breastfed. About half of the babies on each diet were female. The three or more measurements of weight, height, and TBK were usually spaced at 3 weeks, 4 months, 8 months, and 10-14 months. Infants of middle socioeconomic families were admitted to the study regardless of ethnic group. The mothers were advised to follow the same feeding schedule, used the same quantity of solid food additions (21), and recorded the type and amount actually consumed each week (no solid foods were permitted before 3 months of age.)Infants whose mothers breastfed them for 4 months o r more were grouped as "breastfed" in this study. Breast and bottle feedings were ad libitum. The bottle-fed infants consunled a variety of milk-based prepared commercial infant formulas (22). Records of illnesses and physician visits were reported by the mothers. N o ...

Emotional stress that occurred as a result of anticipation and participation in final exams did not change mean serum total cholesterol or high density lipoprotein cholesterol significantly in 26 male students who had eaten two eggs daily while maintaining a controlled diet for 12 wk. These same men continued to maintain a controlled diet but abstained from eating eggs for 12 wk which resulted in a statistically significant lower total cholesterol level at the end of 6 wk and on the day of final exams at the end of 12 wk. Mean values for high-density lipoprotein cholesterol in abstainers were significantly reduced at the end of 6 wk, but did not change further by 12 wk. Mean serum triglycerides values were variable. Blood pressures were not changed significantly.

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