Generating social network data using partially described networks: an example informing avian influenza control in the British poultry industry

Table 2 Crude odds ratios before and after removal of records with missing data: scenario 2 analyses

	Full data (n = 662 farms)			Following the removal of records (n = 348 farms)
Farm-level predictors	OR^a	s.e. OR^b	p-value	OR^a	s.e. OR^b	p-value	% change
L vs. S bird count^d	7.304	1.485	<0.0001	5.588	1.369	<0.0001	23.5
L vs. S house count^d	1.783	1.289	0.023	1.879	1.310	0.019	5.1
Indoors	2.888	1.425	0.003	3.822	1.472	0.001	24.4
Free-range	0.280	1.529	0.003	0.227	1.579	0.001	18.9
Housing other	0.363	1.648	0.043	0.338	1.656	0.031	6.9
Partial housing	0.890	1.991	0.866	0.592	2.254	0.518	33.5^c
Integrated	0.544	1.232	0.003	0.554	1.319	0.033	1.8
East	0.446	1.401	0.017	0.426	1.538	0.047	4.5
Scotland	0.061	2.837	0.007	0.090	2.914	0.024	32.2^c
Wales	0.090	1.722	<0.0001	0.116	2.176	0.006	22.4
West	0.047	1.477	<0.0001	0.056	1.583	<0.0001	16.1

^aOR = odds ratio; ^bs.e. = standard error of the odds ratio; ^c >25% change in odds ratio but direction of association and significance is comparable; ^dL = large, S = small.

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