Randomized Design

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Tzu Tai Lee - One of the best experts on this subject based on the ideXlab platform.

Min Jung Lin - One of the best experts on this subject based on the ideXlab platform.

Denise Alencar Santos - One of the best experts on this subject based on the ideXlab platform.

  • desempenho produtivo de codornas japonesas coturnix coturnix japonica submetidas a diferentes densidades e tipos de debicagem doi 10 4025 actascianimsci v27i1 1263
    Acta Scientiarum. Animal Sciences, 2005
    Co-Authors: Nadja Susana Mogyca Leandro, Norma Silva Vieira, Maíra Silva Matos, Marcos Barcelos Café, José Henrique Stringhini, Denise Alencar Santos
    Abstract:

    This experiment evaluated the effects of beak-trimming in japanese quail pullet phase development; and of beak-trimming combined to different housing densities on their laying performance. For the pullet phase, the experiment had a Randomized Design with three treatments (absent, soft and severe debeaking), each with sixteen-birds repetition. For the laying phase, the experiment had Randomized Design with factorial scheme, with six treatments: three beak trimmings (absent, soft and severe), two densities (75 cm 2 /bird or 103 cm 2 /bird) and four repetitions, with 16 or 22 birds per cage. The results in pullet phase showed that quails submitted to absent or soft beak trimming had better weigh at the pullet phase’s end, but hard beak trimming did not affect sexual maturity. During the laying phase, hard beak-trimming resulted in low mortality and better feed conversion, independently of density. This work results showed the advisability of beak trimming

  • desempenho produtivo de codornas japonesas coturnix coturnix japonica submetidas a diferentes densidades e tipos de debicagem
    Acta Scientiarum. Animal Sciences, 2005
    Co-Authors: Nadja Susana Mogyca Leandro, Norma Silva Vieira, Maíra Silva Matos, Marcos Barcelos Café, José Henrique Stringhini, Denise Alencar Santos
    Abstract:

    This experiment evaluated the effects of beak-trimming in japanese quail pullet phase development; and of beak-trimming combined to different housing densities on their laying performance. For the pullet phase, the experiment had a Randomized Design with three treatments (absent, soft and severe debeaking), each with sixteen-birds repetition. For the laying phase, the experiment had Randomized Design with factorial scheme, with six treatments: three beak trimmings (absent, soft and severe), two densities (75 cm 2 /bird or 103 cm 2 /bird) and four repetitions, with 16 or 22 birds per cage. The results in pullet phase showed that quails submitted to absent or soft beak trimming had better weigh at the pullet phase’s end, but hard beak trimming did not affect sexual maturity. During the laying phase, hard beak-trimming resulted in low mortality and better feed conversion, independently of density. This work results showed the advisability of beak trimming

Walter C Willett - One of the best experts on this subject based on the ideXlab platform.

  • the vitamin d for covid 19 vivid trial a pragmatic cluster Randomized Design
    Contemporary Clinical Trials, 2021
    Co-Authors: Rui Wang, Victor Degruttola, Quanhong Lei, Kenneth H Mayer, Susan Redline, Aditi Hazra, Samia Mora, Walter C Willett, Davaasambuu Ganmaa
    Abstract:

    Abstract Objectives To determine the effect of vitamin D supplementation on disease progression and post-exposure prophylaxis for COVID-19 infection. We hypothesize that high-dose vitamin D3 supplementation will reduce risk of hospitalization/death among those with recently diagnosed COVID-19 infection and will reduce risk of COVID-19 infection among their close household contacts. Methods We report the rationale and Design of a planned pragmatic, cluster Randomized, double-blinded trial (N = 2700 in total nationwide), with 1500 newly diagnosed individuals with COVID-19 infection, together with up to one close household contact each (~1200 contacts), Randomized to either vitamin D3 (loading dose, then 3200 IU/day) or placebo in a 1:1 ratio and a household cluster Design. The study duration is 4 weeks. The primary outcome for newly diagnosed individuals is the occurrence of hospitalization and/or mortality. Key secondary outcomes include symptom severity scores among cases and changes in the infection (seroconversion) status for their close household contacts. Changes in vitamin D 25(OH)D levels will be assessed and their relation to study outcomes will be explored. Conclusions The proposed pragmatic trial will allow parallel testing of vitamin D3 supplementation for early treatment and post-exposure prophylaxis of COVID-19. The household cluster Design provides a cost-efficient approach to testing an intervention for reducing rates of hospitalization and/or mortality in newly diagnosed cases and preventing infection among their close household contacts.

Jiunn Wang Liao - One of the best experts on this subject based on the ideXlab platform.