A direct data entry system for processing dietary records: comparison with manual coding |
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Authors: | Alison M. Sheppard&dagger ,Karen J. Coles&dagger ,Ann M. Fehily&Dagger ,Ruth M. Holliday |
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Affiliation: | *Medical Research Council Epidemiology Unit (South Wales), 4 Richmond Road, Cardiff CF2 3AS;†Division of Nutrition and Food Science, Department of Biochemistry, University of Surrey, Guildford, Surrey, GU2 5XH, UK |
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Abstract: | Forty 7-day weighed food intake records were coded twice, once by transcribing codes and weights manually onto data sheets and once by direct data entry into a microcomputer using a menu-driven food coding program. To reduce the possibility of bias, a crossover design was used: one survey assistant coded the first 20 manually and then the second 20 by direct data entry; the other survey assistant coded the first 20 by direct data entry and the second 20 manually. The direct data entry system was found to reduce coding time by 32% and total processing time by 34%. The number of errors was also substantially reduced (by 39%). Direct data entry therefore represents a considerable improvement in the efficiency of data processing: for every 100 7-day records, 60 h of processing time would be saved. |
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Keywords: | dietary surveys computers weighed records |
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