Table 2:

Odds Ratios of Having Frequent Headaches or Migraines Since Hurricane Katrina for Posttraumatic Stress Disorder (PTSD) Symptom Scores and Covariates

Variable	Odds ratios of having frequent headaches/migraines since Katrina
	Model la		Model 2b		Model 3C		Model 4d
	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI
Impact of Event Scale Avoidance score	.91	[.67, 1.23]			1	[.69, 1.45]
Impact of Event Scale Hyperarousal score	1.43	[.97,2.12]			1.14	[.72, 1.82]
Impact of Event Scale Intrusion score	1.55*	[1.03, 2.33]			1.93**	[1.18,3.16]
Impact of Event Scale total score			2.10***	[1.64,2.68]			2.27***	[1.69,3.04]
Experienced frequent headaches or migraines prior to baseline interview
	4.20***	[2.05, 8.60]	4.19***	[2.06, 8.54]	4.19***	[1.86,9.47]	3.99***	[1.79,8.91]
Household received food stamps at baseline	1.26	[.78, 2.04]	1.23	[.76, 1.98]	1.39	[.79, 2.46]	1.39	[.79, 2.44]
Household received cash assistance/welfare at baseline
	2.13*	[1.06,4.31]	2.04*	[1.02,4.10]	2.07	[.91,4.71]	1.97	[.87, 4.43]
Household received unemployment benefits at baseline
	1.55	[.57, 4.20]	1.67	[.62, 4.52]	1.27	[.40, 4.04]	1.39	[.44, 4.37]
Race/ethnicity (non-Hispanic White = reference)
Non-Hispanic Black	.7	[.33, 1.47]	.7	[.33, 1.47]	.66	[.28, 1.56]	.63	[.27, 1.49]
Hispanic	.71	[.14,3.57]	.73	[.15,3.63]	.64	[.11,3.55]	.59	[.10,3.27]
Other race/ethnicity	.73	[.13,4.22]	.74	[.13,4.07]	.47	[.06, 3.77]	.5	[.06, 3.98]
Age in years	1.04	[.99, 1.10]	1.04	[.99, 1.10]	1.01	[.95, 1.07]	1.01	[.95, 1.07]
Home flooding depth (feet)	.95	[.86, 1.06]	.96	[.87, 1.07]	.91	[.80, 1.03]	.91	[.80, 1.04]
In two pre-Katrina survey waves	1.78	[1.00,3.19]	1.84*	[1.04,3.28]	1	[1.00, 1.00]	1	[1.00, 1.00]
Close friend or family member killed as a result of Hurricane Katrina or Rita (no = reference)
					1.14	[.61,2.10]	1.19	[.65,2.19]
Hurricane-related home damage (none, minimal, not serious = reference)
Moderate or substantial home damage					.75	[.36, 1.56]	.76	[.37, 1.59]
Enormous home damage/home was destroyed					.81	[.36, 1.80]	.82	[.37, 1.82]
Hurricane-related trauma count					1.05	[.96, 1.15]	1.05	[.96, 1.14]

Note. OR= odds ratio; Cl = confidence interval.

^aPTSD symptoms represented by cluster scores, whole sample included (n= 409).

^bPTSD symptoms represented by total score, whole sample included (n= 409).

^cPTSD symptoms represented by cluster scores, adjusted for hurricane trauma count as sensitivity analysis (n= 326).

^dPTSD symptoms represented by total score, adjusted for hurricane trauma count as sensitivity analysis (n= 326).

^*p < .05.

^**p < .01.

^***p <.001.