Table 4.

Univariate logistic regression for pathogens with case categories 0, 1, 2, ≥3

Pathogen	IMD quintile	OR (≥1 cases compared to 0 cases) (95% CI)	OR (≥2 cases compared to ≤1 cases case) (95% CI)	OR (≥3 cases compared to ≤2 cases case) (95% CI)	OR (Proportional odds assumption met) (95% CI)	p-value
Giardia	1 (least deprived)	1.00	1.00	1.00	1.00	<0.001
	2				0.88 (0.82–0.94)
	3				0.83 (0.77–0.89)
	4	0.69 (0.64–0.74)	0.63 (0.58–0.70)	0.55 (0.48–0.63)
	5 (most deprived)	0.60 (0.56–0.65)	0.53 (0.48–0.59)	0.45 (0.39–0.52)
Non-typhoidal Salmonella	1				1.00	0.0042
	2				1.00 (0.93–1.06)
	3				1.00 (0.94–1.07)
	4				1.07 (1.00–1.14)
	5				1.09 (1.03–1.17)
Norovirus	1				1.00	<0.001
	2				1.18 (1.10–1.27)
	3				1.22 (1.14–1.31)
	4				1.15 (1.07–1.23)
	5				1.29 (1.20–1.38)