Table 3.

Cumulative observed relative risks* and 95% confidence intervals for health outcomes over response wave.

Outcome	Number of contacts
	1		2		3		4+ (all)**
Symptoms >17	1.24	1.09, 1.42	1.23	1.09, 1.39	1.21	1.08, 1.36	1.22	1.09, 1.36
PTSD	1.12	0.89, 1.43	1.15	0.93, 1.41	1.13	0.92, 1.38	1.09	0.89, 1.33
N	7384		9035		9793		10234

Estimates are weighted to allow for oversampling of reservists.

*Adjusted for age, sex, rank, service type, and reservist status.

**These estimates are slightly different from those reported in [12] because we use relative risks rather than odds ratios, and also because we have excluded any confounders that were likely to be misclassified which could cause extra bias.