BMC Infectious Diseases

Table 3 Comparative analysis of standard and isotonic scans of TB mortality, Londrina, Brazil (2008–2015)

From: Detection of risk clusters for deaths due to tuberculosis specifically in areas of southern Brazil where the disease was supposedly a non-problem

Rate		High			Low
Pop. at risk (%)		10	30	50	10	30	50
No. census sectors	Standard	32	153	153	63	216	217
No. census sectors	Isotonic	60	149	281	63	216	261
Pop. of cluster	Standard	22993	102433	102433	53032	143762	144328
Pop. of cluster	Isotonic	47193	112265	203830	53032	143762	172652
Annual cases/100,000	Standard	6.4	3.4	3.4	0	0.4	0.4
Annual cases/100,000	Isotonic	3.7	3.0	2.3	0	0.4	0.6
No. cases	Standard	12	29	29	0	5	5
No. cases	Isotonic	14	27	38	0	5	8
Expected cases	Standard	2.9	13.3	13.3	6	18.3	18.4
Expected cases	Isotonic	5.9	14	25.8	6.1	18.3	22
Radius (km)	Standard	1.4	2.4	2.4	1.6	5.9	6.0
Radius (km)	Isotonic	1.8	2.9	3.9	1.6	5.9	6.3
LLR^a	Standard	8.7	9.7	9.7	6.4	8.7	8.7
LLR^a	Isotonic	9.6	12.3	12.7	6.4	9.5	9.9
p-value	Standard	0.05	0.02^**	0.03^**	0.05	0.04^**	0.04^**
p-value	Isotonic	0.04^**	0.01^**	< 0.01^**	0.05	0.02^**	0.02^**

^aLog likelihood ratio; ^**p < 0.05

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ISSN: 1471-2334

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