International Journal of Health Geographics

Table 5 Summary of the results for male and female lung cancer, by community level

From: Detecting cancer clusters in a regional population with local cluster tests and Bayesian smoothing methods: a simulation study

				Male lung cancers				Female lung cancers
RR	Method		Parameter	TP urban	FP urban	TP rural	FP rural	TP urban	FP urban	TP rural	FP rural
RR = 2.0	Besag &	k = 15	sum	210	80	1	269	27	17	1	361
	Newell		DR	0.21		0.00		0.03		0.00
			PPV	0.72		0.00		0.61		0.00
			LR+	202.13				135.9		0.00
		k = 20	sum	220	40	240	92	39	51	414	384
			DR	0.22		0.24		0.04		0.41
			PPV	0.85		0.72		0.43		0.52
			LR+	423.50		200.87		60.4		69.45
		k = 30	sum	220	150	1	361	50	57	1	842
			DR	0.22		0.00		0.05		0.00
			PPV	0.59		0.00		0.47		0.00
			LR+	112.93		0.00		67.5		0.00
	Kulldorff		sum	501	3974	92	3770	744	3220	80	3996
	spatial scan		DR	0.50		0.09		0.74		0.08
	statistic		PPV	0.11		0.02		0.19		0.02
			LR+	9.71		1.88		17.7		1.54
	Local		sum	190	1512	37	1728	34	126	52	1569
	Moran’s I		DR	0.19		0.04		0.03		0.05
	exact		PPV	0.11		0.02		0.21		0.03
			LR+	9.68		1.65		20.78		2.55
RR = 4.0	Besag &	k = 15	sum	126	172	2	260	242	130	1	368
	Newell		DR	0.13		0.00		0.24		0.00
			PPV	0.42		0.01		0.65		0.00
			LR+	56.41		0.59		143.34		0.00
		k = 20	sum	232	102	224	120	384	382	464	610
			DR	0.23		0.22		0.38		0.46
			PPV	0.69		0.65		0.50		0.43
			LR+	175.14		143.73		77.40		58.57
		k = 30	sum	250	80	2	321	920	810	2	1105
			DR	0.25		0.00		0.92		0.00
			PPV	0.76		0.01		0.53		0.00
			LR+	240.63		0.48		87.46		0.00
	Kulldorff ’s		sum	999	11542	351	5590	916	6506	155	4469
	spatial scan		DR	1.00		0.35		0.92		0.16
	statistic		PPV	0.08		0.06		0.12		0.03
			LR+	6.66		4.83		10.84		2.67
	Local		sum	398	732	106	1636	304	1130	72	1588
	Moran’s I		DR	0.40		0.11		0.30		0.07
	exact		PPV	0.35		0.06		0.21		0.04
			LR+	41.87		4.99		20.72		3.49

TP = true positive, FP = false positive; DR = detection rate, PPV = positive predictive value.
LR + = likelihood ratio of a positive test result.

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ISSN: 1476-072X

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