HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Full Text (PDF) Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Davis, D. R. Articles by Riordan, H. D. Search for Related Content PubMed PubMed Citation Articles by Davis, D. R. Articles by Riordan, H. D.

Changes in USDA Food Composition Data for 43 Garden Crops, 1950 to 1999

Bio-Communications Research Institute, Wichita, Kansas (D.R.D., M.D.E., H.D.R.)
Biochemical Institute, The University of Texas, Austin, Texas (D.R.D.)

View larger version (38K): [in a new window]   Fig. 1. The central range and spread of R-values, moisture-adjusted except for water and dry matter. Each box plot shows the median R (line inside the grey box), the central 50% of R-values (the box, showing the interquartile range, IR), the range of adjacent values that are within 1.5 x IR of the ends of the box, and individual outliers. The number of foods is 42 or 43, except 28 for vitamin A. Ascorbic acid R-values are slight overestimates (see discussion of group changes). Six outliers are not shown: Fat 6.7, vitamin A 3.0 and 3.8, riboflavin 3.4, niacin 3.2 and 3.7.

View larger version (28K): [in a new window]   Fig. 2. Median ratios R with 95% confidence intervals for 42 to 43 foods (28 for vitamin A). R-values for ascorbic acid are slight overestimates (see discussion of group changes).

View larger version (19K): [in a new window]   Fig. 3. Ratios of mean protein contents R (1999/1950`) for individual foods. Mean R-values and their 95% confidence intervals are shown for two estimates of the uncertainty (SE) of the 1950 means. For the low estimates of the 1950 SEs, the mean R-values are the left tic marks, and the 95% CIs are the wide vertical lines. For the high estimates, the mean R-values are the right tic marks, and the 95% CIs are the narrow vertical lines. Median R-values (not shown) are less than or usually about equal to the left tic marks, and do not depend appreciably on the SEs. Missing foods have inadequate data for this analysis.

View larger version (21K): [in a new window]   Fig. 4. Ratios of mean ash contents R (1999/1950`). See Fig. 3 caption. For food no. 18, the narrow line extends to 4.3.

View larger version (23K): [in a new window]   Fig. 5. Ratios of mean ascorbic acid contents, R (1999/1950`). See Fig. 3 caption. For food no. 3, the narrow line extends beyond 60. Most values are slight overestimates (see discussion of group changes).