aplikasi meta-analisis dalam industri feed additive dan ......aplikasi meta-analisis dalam industri...
TRANSCRIPT
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Aplikasi Meta-analisis dalam Industri Feed Additive dan Obat Hewan Menuju Era 4.0
Anuraga Jayanegara, Muhammad Ridla, Erika B. Laconi, NahrowiFakultas Peternakan IPB
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Outline
A. Latar belakangB. Pengenalan meta-analisis C. Metode meta-analisisD. Aplikasi meta-analisis pada industri feed additive
dan obat hewanE. Potensi kolaborasi
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A. Latar belakang
- Semakin banyaknya data tersedia (publikasi ilmiah, data R&D industri, laporan, dsb.)
- Bervariasinya kualitas data antar studi- Lemahnya pengambilan kesimpulan berdasarkan studi atau
eksperimen tunggal- Revolusi industri 4.0 big data utilization- Pentingnya “forecasting” dan “decision” dalam industri feed
additive dan obat hewan
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- Research synthesis = review of primary research on a given topic with a purpose of integrating the findings (creating generalizations, conflict resolution)
- Systematic review = the type of research synthesis on a precisely defined topic using systematic and explicit methods to identify, select, critically appraise and analyze relevant research
- Meta-analysis = statistical synthesis of the results of separate studies (quantitative research synthesis)
B. Pengenalan meta-analisis
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Research synthesis
Systematic review Meta-analysis
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C. Metode meta-analisis
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1. Question formulation stage
2. Data collection stage
3. Data evaluation stage
4. Analysis and interpretation stage
5. Public presentation stage
Tahapan meta-analisis
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Effect size
•Hedges’ d
•Response ratio
•Original data (ANOVA-based MA)
Kombinasi studi
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Standardized mean difference between means (Hedges’ d)
Xe – mean of the experimental group
Xc – mean of the control group
s – pooled standard deviation
J – correction term that removes small-sample-size bias
Js
cXeXd
)(
Hedges’ d
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2
)1()1( 22
ce
ccee
NN
sNsNs
Pooled standard deviation:
1)2(4
31
ce NNJ
Correction term:
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Standardized difference between means
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The variance of Hedges’ d
Ne – sample size of the experimental group
Nc – sample size of the control group
)(2
2
cece
ced
NN
d
NN
NN
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Interpretation of magnitude of d
• Cohen’s benchmarks:
• |d | = 0.2 – small effects• |d | = 0.5 – moderate effects• |d | = 0.8 – large effects
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Variance:
)ln()ln(lnln ce
c
e XXX
XR
2
2
2
2
ln)()( cc
c
ee
eR
XN
s
XN
s
Response ratio
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Advantages of response ratio
• Easily interpretable
• Results of primary studies are often presented in the form of response rations
• Effect sizes are not affected by different variance in control and experimental groups
• SD/SE are not needed for calculation of the effect size (but needed to calculate variance)
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Pearson’s correlation coefficient (r)
• easy to interpret• varies from –1 to +1• Cohen’s ”rules-of-thumb”:
• | r | = 0.10 – small • | r | = 0.25 – medium • | r | = 0.40 - large
• coefficient of determination (r2) • r2= % of variance explained
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Statistical models
ANOVA based MA
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Ilustrasi meta-analisis
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Jayanegara and Palupi (2010)Media Peternakan 33, 176-181
Tanin dan by-pass protein
D. Aplikasi pada industri feed additive
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Dietary tannins (g/kg DM)
0 50 100 150 200 250
Chang
e o
f C
H4
/dig
estib
le O
M (
%)
-80
-60
-40
-20
0
20
40
In vitro batch studies
In vivo studies
Jayanegara et al. (2012)Journal of Animal Physiology and Animal Nutrition 96, 365-375
Tanin dan efisiensi energi
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Tanin dan kualitas silase
Jayanegara et al. (2019)Journal of Animal Physiology and Animal Nutrition 103, 456-465
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3-NOP dan emisi CH4
Jayanegara et al. (2018)Italian Journal of Animal Science 17, 650-656
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Zn organik vs anorganik
Zinc Form
No Response parameter Unit N Control Organic Inorganic P-value
Dose average mg/kg 0 62.83 62.89
Production Performance
1 Average Daily Gain g/bird/day 195 39.2 42.2 41.4 0.222
2 Feed Conversion Ratio
(FCR)
g feed/ g gain 154 1.78b 1.72a 1.73a 0.017
3 Mortality % 12 0 1.28 1.30 0.707
4 Average Daily Intake g/bird/day 174 70.4 72.6 72.3 0.56
5 Carcass % 14 68.1 69.4 69.5 0.448
6 Abdominal Fat % 11 1.18a 0.98ab 0.68b 0.034
Hidayat et al. (2019)Asian Australasian Journal of Animal Sciences, in press
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DL metionin vs MHASauer et al. (2008)Poultry Science 87, 2023-2031
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Kualitas susu organik
Palupi et al. (2012)Journal of the Science of Food and Agriculture 92, 2774-2781
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E. Potensi kolaborasi
- Penentuan dosis optimum suatu feed additive/supplement/OH- Komparasi efektivitas di antara feed additive/supplement/OH
yang sejenis- Klaim keunggulan suatu produk- Dsb.
Interested? Please kindly contact AINI
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Thank you very much for your attention!