Table 3. Univariable analysis of reinfection cases >16 years of age, London, 2009–2015.

	Exposure	Reinfection TB cases			Non- Reinfection TB cases			Odds Ratio	95% confidence interval	p*
		Total	Exposed	%	Total	Exposed	%
Sex	Male	880	492	55.91	19,220	11,309	58.84	0.89	[0.77–1.02]	0.084
Social risk factors	Any risk factors	766	125	16.32	17,029	1,739	10.21	1.71	[1.40–2.10]	<0.001
	Homelessness	841	46	5.47	18,229	617	3.38	1.65	[1.19–2.25]	0.001
	Prison history	836	40	4.78	18,179	452	2.49	1.97	[1.38–2.75]	<0.001
	Drug use	834	45	5.4	18,140	661	3.64	1.51	[1.08–2.06]	0.009
	Alcohol use	776	54	6.96	17,213	742	4.31	1.66	[1.22–2.21]	<0.001
Site of disease	CNS* TB	880	104	11.82	19,223	2,258	11.75	1.01	[0.81–1.24]	0.948
Time since entry into UK	UK born	803	111	13.82	16,883	2,692	15.95	Reference
	0–1 years	803	69	8.59	16,883	2,551	15.11	0.66	[0.48–0.89]	0.007
	2–5 years	803	110	13.7	16,883	4,105	24.31	0.65	[0.50–0.85]	0.002
	6–10 years	803	157	19.55	16,883	2,749	16.28	1.39	[1.08–1.78]	0.01
	11+ years	803	356	44.33	16,883	4,786	28.35	1.80	[1.45–2.24]	<0.001
Ethnic group	Indian	879	230	26.17	19,041	5,734	30.11	Reference
	White	879	108	12.29	19,041	2,097	11.01	1.28	[1.02–1.62]	<0.001
	Black Caribbean	879	19	2.16	19,041	640	3.36	0.74	[0.46–1.19]	0.214
	Black African	879	233	26.51	19,041	4,160	21.85	1.40	[1.16–1.68]	<0.001
	Pakistani	879	89	10.13	19,041	1,899	9.97	1.17	[0.91–1.50]	0.223
	Bangladeshi	879	41	4.66	19,041	1,130	5.93	0.90	[0.64–1.27]	0.561
	Mixed/other	879	159	18.09	19,041	3,381	17.76	1.17	[0.95–1.44]	0.131
World region of birth	West Europe	841	130	15.46	18,496	3,140	16.98	Reference
	Central Europe	841	28	3.33	18,496	586	3.17	1.15	[0.76–1.75]	0.501
	East Asia	841	8	0.95	18,496	193	1.04	1.00	[0.48–2.07]	0.997
	East Europe	841	9	1.07	18,496	153	0.83	1.42	[0.71–2.85]	0.322
	East Mediterranean	841	8	0.95	18,496	153	0.83	1.26	[0.61–2.63]	0.532
	North Africa	841	14	1.66	18,496	184	0.99	1.84	[1.04–3.25]	0.037
	North America & Oceania	841	0	0	18,496	42	0.23	1.00
	South Asia	841	348	41.38	18,496	8,769	47.41	0.96	[0.78–1.18]	0.686
	South East Asia	841	36	4.28	18,496	603	3.26	1.44	[0.99–2.11]	0.059
	South, Central America & Caribbean	841	12	1.43	18,496	423	2.29	0.69	[0.38–1.25]	0.217
	Sub-Saharan Africa	841	245	29.13	18,496	4,110	22.22	1.44	[1.16–1.79]	0.001
	Unknown	841	3	0.36	18,496	140	0.76	0.52	[0.16–1.65]	0.265
Age group	16–19	880	16	1.82	19,223	840	4.37	Reference
	20–29	880	160	18.18	19,223	5,696	29.63	1.47	[0.88–2.48]	0.142
	30–39	880	216	24.55	19,223	5,071	26.38	2.24	[1.34–3.74]	0.002
	40–49	880	166	18.86	19,223	3,052	15.88	2.86	[1.70–4.80]	<0.001
	50–59	880	117	13.30	19,223	1,968	10.24	3.12	[1.84–5.30]	<0.001
	60–69	880	101	11.48	19,223	1,251	6.51	4.24	[2.48–7.23]	<0.001
	70–79	880	72	8.18	19,223	919	4.78	4.11	[2.37–7.13]	<0.001
	80+	880	32	3.64	19,223	426	2.22	3.94	[2.14–7.27]	<0.001

*From Wald test.