Table 5 Cluster detection analysis results for PTSS trajectory groups in Galveston and Chambers counties, TX, using the maximum reported spatial window of 40% of the sample population and the multivariate scan statistic.

	LLR	Predictor group	Trajectory group
Cluster 1**			Resilience		Delayed		Recovery		Chronic
Radius			RR	%	RR	%	RR	%	RR	%
3.8 km	72.32	55 years or older	0.66	53.2	1.41	9.7	2.17	25.8	18.06	11.3
		non-Hispanic Black	0.37	29.0	10.06	19.4	1.10	32.3	5.03	19.4
		Hispanic	0.78	60.0	0.54	2.5	1.42	17.5	3.25	20.0
		Other non-Hispanic	1.25	100	—	—	—	—	—	—
		Predisaster probable PTSD	0.38	21.4	—	—	0.75	21.4	8.00	57.1
		Any loss of sentimental possessions or pets	0.57	41.4	4.80	10.0	1.43	32.9	7.54	15.7
		Financial loss as a result of Ike	0.62	44.8	0.36	1.7	1.81	32.8	4.38	20.7
		Medium peri-event emotional reactions	0.58	46.2	2.95	15.4	1.99	26.9	11.08	11.5
		High peri-event emotional reactions	0.31	16.1	1.47	9.7	1.23	38.7	3.85	35.5
Cluster 2*
10.6 km	37.09	55 years or older	1.15	80.6	2.29	12.9	0.24	4.8	0.37	1.6
		non-Hispanic Black	1.54	78.6	0.33	3.6	0.56	14.3	0.28	3.6
		Hispanic	1.16	78.6	8.25	10.7	0.20	3.6	0.55	7.1
		Other non-Hispanic	0.86	75.0	—	—	—	—	INF	0
		Predisaster probable PTSD	1.30	61.5	1.46	7.7	0.52	15.4	0.88	15.4
		Any loss of sentimental possessions or pets	1.76	100	—	—	—	—	—	—
		Financial loss as a result of Ike	1.31	78.0	4.68	9.8	0.18	4.9	0.70	7.3
		Medium peri-event emotional reactions	1.05	75.9	1.60	10.3	0.80	13.8	-	-
		High peri-event emotional reactions	1.51	58.8	1.76	11.8	0.15	5.9	1.51	23.5

Notes: LLR = Log likelihood ratio, RR = relative risk, computed as the ratio of the proportions of the number of cases in each category out of total number of cases inside the cluster versus outside, % = Percentage of cases falling in each group within in a cluster. Significance codes: p < 0.001 ‘***’p < 0.01 ‘**’p < 0.05 ‘*’p < 0.1 ‘.’ Lowest and Highest RR in bold.

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