Table 2

Univariate analysis of association between deprivation, population density, and ethnicity, and incidence of tuberculosis in 0–18 year olds in Leeds Health Authority, 1982–1997

Population	Variable	Range	Incidence rate ratio	95% confidence interval
All 0–18 year olds		Deprivation (Carstairs index)^2-151		−3.55 to −2.24	1
				−2.03 to −1.2	1.54	0.57 to 4.18
				−0.08 to 1.77	1.50	0.53 to 4.23
		2.71 to 5.79	2.17	0.82 to 5.71
		5.93 to 8.47	4.85^2-150	1.97 to 11.92
	Population density		5.37 to 8.93	1
	Population density		9.07 to 10.71	0.80	0.29 to 2.23
		10.87 to 14.68	1.13	0.43 to 2.99
		15.42 to 21.77	2.31	0.93 to 5.77
		22.33 to 42.28	3.23^2-150	1.36 to 7.66
	Ethnicity (proportion non-white)		0.005 to 0.009	1
			0.009 to 0.013	1.32	0.43 to 4.07
			0.016 to 0.030	3.00	1.11 to 8.07
		0.034 to 0.076	2.62	0.95 to 7.21
		0.102 to 0.339	5.53^2-150	2.14 to 14.30
South Asian 0–18 year olds		Deprivation (Carstairs index)^2-151		−3.55 to −1.29	1
				−1.20 to 3.65	2.11	0.58 to 7.70
				4.08 to 5.79	1.60	0.32 to 7.92
		5.93 to 8.47	1.32	0.34 to 5.11
		8.47 to 8.47	3.15	0.90 to 10.95
	Population density		5.37 to 11.77	1
	Population density		12.14 to 22.33	2.03	0.61 to 6.74
		26.89 to 28.19	1.11	0.30 to 4.12
		31.41 to 34.97	1.63	0.46 to 5.77
		42.28 to 42.28	2.90	0.96 to 8.84
Non-south Asian 0–18 year olds		Deprivation (Carstairs index)		−3.55 to −2.24	1
				−2.03 to −1.29	0.83	0.26 to 2.65
				−1.20 to 1.77	1.33	0.47 to 3.77
		2.71 to 5.79	1.33	0.46 to 3.82
		5.93 to 8.47	3.32^2-150	1.30 to 8.51
	Population density		5.37 to 8.9	1
	Population density		9.07 to 10.38	0.72	0.22 to 2.36
		10.71 to 13.64	0.91	0.30 to 2.73
		14.68 to 21.77	1.85	0.68 to 5.04
		27.33 to 42.28	1.93	0.70 to 5.27

↵2-151 Lower value, least deprived; higher value, most deprived.
↵2-150 Significant at p < 0.05.