Results Although UK veterans had similar mean PF scores as US veterans (mean differences in PGW: 0.86, 95% CI 20.36 to 2.07 and in non-deployed 20.61, 95% CI 21.84 to 0.62), they had worse mean GHP scores (mean differences in PGW: 25.62, 95% CI 27.44 to 23.80 and in non-deployed 23.83, 95% CI 25.40 to 22.27). UK PGW veterans were more likely to report Gulf specific exposures, and this was associated with worse GHP (UK mean difference 29.05, 95% CI 211.49 to 26.61 versus US mean difference

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... 95% CI 26.62 to 21.98). Conclusions This study observed transatlantic variations in health status in military populations that may reflect cultural differences in the reporting of health.