TY - JOUR T1 - Authors' response JF - British Journal of General Practice JO - Br J Gen Pract SP - 51 LP - 51 DO - 10.3399/bjgp08X263839 VL - 58 IS - 546 AU - Matthew Hankins AU - Helen Smith Y1 - 2008/01/01 UR - http://bjgp.org/content/58/546/51.abstract N2 - Roy Powell makes several points in his letter. We will attempt to be brief in our response.We were aware of the papers he mentions, but the PAIS and the DISQ are different to the IPQ. We found one paper that evaluated the IPQ in a UK sample. We criticised that paper for failing to report the reliability and validity of the IPQ.1 Powell essentially confirms our four main criticisms … ER -