A consecutive group of 250 patients underwent medico-legal assessment at a mean of 24 (±13) months following upper limb injuries. Each had completed questionnaires to assess function (Quick-DASH) and cold intolerance (CIQ36) before clinical assessment following which their whole limb impairment percentage was calculated. The mean(±SD) whole limb impairment, QDASH and CIQ36 scores were 9(±14)%, 43(±24) and 17(±10), respectively. There was a significant correlation between whole limb impairment and QDASH, although some patients reported surprisingly high disability levels despite minimal or no objective functional impairment. Whilst useful qualitative information can be obtained from questionnaires, the correlation between subjective and objective scores is weak albeit statistically significant. Individual patients can show marked discrepancies between objective and subjective functional scores. The results of questionnaires in individual medico-legal patients should be treated with caution.