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| Author(s): |
Regiane Cristina do Amaral
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Piracicaba, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Faculdade de Odontologia de Piracicaba |
| Defense date: | 2014-02-19 |
| Examining board members: |
Paulo Frazão;
Maria da Luz Rosário de Sousa;
Paulo Capel Narvai;
Betzabeth Slater Villar;
Fabio Luiz Mialhe
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| Advisor: | Jaime Aparecido Cury; Paulo Frazão |
| Abstract | |
Objective: To compare the use of indirect measures of extrinsic sugars consumption, through an instrument of self-reported and through three R24h (diet recall 24 h), using as a reference method the R24h and to compare the direct measures (by measures biochemical ) and indirect measure (by R24h) of consumption of sugars in order to verify a possible correlation between these measures. Materials and methods: An cross-sectional observational study was conducted in a purposive sample of 87 adolescents (13-16 years) residing in the city of Piracicaba in 2011. The adolescents were identified according to tertiles of sugar intake and they answered three R24h (with an interval of 15 days between each application), and a self-reported instrument containing questions about intake, frequency of sugar and moment with which they were exposed. The foods described in the R24h were converted into energy (Kcal), with carbohydrates and energy using the Dietwin program and the amount of the sugar consumed was converted by the USDA program. Were collected saliva of volunteers to analysis of sucrase enzyme and biofilm to analysis of Ca, Pi and F present in this biofilm. Results: Comparing the R24h with the self-reported instrument in mean the values obtained from the instrument are always higher than those reported in the average intake of R24h, with a statistically significant difference for most items (Wilcoxon test p < 0 05). Regarding the time of intake, there was not a clear trend of overestimation, being that 6 of the 11 items assessed, the estimates produced by the methods were not significantly different (McNemar test). Comparing the R24h with biochemical measures, statistically significant correlations between frequency / quantity and Energy were found; frequency / quantity and Carbohydrate. However, no statistically significant differences between the frequency and the amount of sugar intake and biochemical measures (Kendall¿s correlation test) were found. Conclusions: The estimates of feeding behavior reported by the adolescent in a self-reported instrument should be considered with caution. Comparing indirect measures (R24h) and direct measure (biochemical measures), it is observed that the biochemical measures in the population level do not reflect the variation in intake of sugars estimated by R24h (AU) | |
| FAPESP's process: | 10/19599-1 - Validity on a scale of eight food items to measure the frequency of sucrose intake |
| Grantee: | Regiane Cristina Do Amaral |
| Support Opportunities: | Scholarships in Brazil - Doctorate |