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Table 3 GAM investigating seasonality, time trend in the time-series and effect of commodity price

From: Evaluation of Swiss slaughterhouse data for integration in a syndromic surveillance system

  

Peak month

Trough month

Model

Time trend

Commodity

Price effect

  

Nb. slaughters

Nb. condemn

Nb. slaughters

Nb. condemn

Nb. slaughters

Nb. condemn

Nb. slaughters

Nb. condemn

Nb. slaughters

Nb. condemn

Pigs

N

December

December

May

July

ARMA(7,0)

ARMA(0,0)

Yes ↑↓

Yes ↑

Yes

No

E

January

December

July

July

ARMA(0,0)

ARMA(0,0)

Yes ↑

No

-

-

Cattle

N

March

December

July

January

ARMA(3,2)

ARMA(1,0)

Yes ↑

No

Yes

No

E

March

March

Nov

Nov

ARMA(3,0)

ARMA(0,0)

Yes ↓

Yes ↑

-

-

Small ruminants

N

March

June

July

February

ARMA(2,1)

ARMA(0,0)

No

No

No

No

E

March

June

August

November

ARMA(0,0)

ARMA(0,0)

Yes ↑↓

Yes ↑↓

-

-

  1. Residuals were modeled using an ARMA(p,q) process to account for non-independence (when applicable). Results from both normal (N) and emergency (E) slaughters are presented. ↑ denotes a significant increase; ↓ a significant decrease and ↑↓ significant fluctuations.