Table 1.

Results for the regressions with autocorrelated errors the raw series, estimates, 95% confidence intervals and temporal error structure

Explanatory variablea	Remainder structureb	Parameter value	95% CI
Chicken at retail	ARMA(10,0)	1·45	[−3·73 to 6·63]
Surface water	ARMA(0,6)	−4·26	[−10·23 to 1·71]
Barbequing	White noise	22·55	[17·28–27·82]
Swimming in natural water	ARMA(5,0)	19·08	[7·91–30·25]
Barbequing + natural water	White noise	Bbq : 17·54	[11·13–23·95]
		Swim : 15·55	[10·78–20·32]

^aSignificant models are bolded.

^bARMA (p, q): autoregressive moving average process of order p for auto-regressive process and order q for moving average process.