{"classes":[{"categories":[{"measurements":[{"groupId":"OG000","value":"300"},{"groupId":"OG001","value":"2925"}]}],"title":"Never (with 2 year lag)"},{"categories":[{"measurements":[{"groupId":"OG000","value":"0"},{"groupId":"OG001","value":"3"}]}],"title":"> 1 year (with 2 year lag)"},{"categories":[{"measurements":[{"groupId":"OG000","value":"0"},{"groupId":"OG001","value":"0"}]}],"title":"> 2 year (with 2 year lag)"},{"categories":[{"measurements":[{"groupId":"OG000","value":"0"},{"groupId":"OG001","value":"0"}]}],"title":"> 3 year (with 2 year lag)"},{"categories":[{"measurements":[{"groupId":"OG000","value":"299"},{"groupId":"OG001","value":"2916"}]}],"title":"Never (without 2 year lag)"},{"categories":[{"measurements":[{"groupId":"OG000","value":"0"},{"groupId":"OG001","value":"5"}]}],"title":"> 1 year (without 2 year lag)"},{"categories":[{"measurements":[{"groupId":"OG000","value":"0"},{"groupId":"OG001","value":"1"}]}],"title":"> 2 year (without 2 year lag)"},{"categories":[{"measurements":[{"groupId":"OG000","value":"0"},{"groupId":"OG001","value":"0"}]}],"title":"> 3 year (without 2 year lag)"}],"denoms":[{"counts":[{"groupId":"OG000","value":"300"},{"groupId":"OG001","value":"2935"}],"units":"Participants"}],"description":"Incident bone/joint cancer. Gabapentin Exposure Description: With 2 year lag = Gabapentin exposure from cohort entry to 2 years prior to index date (to control for prediagnostic prescribing for pain symptoms possibly related to cancer). Without 2 year lag = Gabapentin exposure from cohort entry to index date.","groups":[{"description":"Patients with incident bone/joint cancer defined from READ/OXMIS codes in the years 1995-2008","id":"OG000","title":"Incident Bone/Joint Cancer Patients"},{"description":"Cancer-free control patients risk set matched with incident bone/joint cancer patients for sex, age at cohort entry (within two years), calendar year of cohort entry (within one year), and General Practice site","id":"OG001","title":"Matched Controls for Incident Bone/Joint Cancer Patients"}],"paramType":"NUMBER","populationDescription":"Cases \\& controls drawn from the GPRD study cohort. Entry into study cohort began January 1, 1993, or at time of GPRD registration if after Jan. 1, 1993. Follow-up ended December 31, 2008, or earlier if respective cancer was diagnosed or if participant left the GPRD for any reason including death. Participants with prior history of cancer excluded.","reportingStatus":"POSTED","timeFrame":"The case index date was the date of incident bone/joint cancer diagnosis ascertained in the GPRD study cohort 1995-2008. The matched control index date was the date at which the follow-up time from his/her cohort entry was the same as for the case.","title":"Number of Bone/Joint Cancer Cases and Matched Controls With the Indicated Long Duration of Exposure to Gabapentin","type":"PRIMARY","unitOfMeasure":"participants"}