INDIRECT COSTS


THE IMPACT OF INFLAMMATORY BOWEL DISEASE IN CANADA 64


Table 3: Summary of Long-Term Work Loss Studies85 ABS (2003)109 Country Year of study Diseases Data sources # with IBD Number of Controls Average Age


Proportion Male Proportion


Employed (IBD) Proportion


Employed (Controls)


Estimated Relative Risk


Confounders Controlled


Australia 2003 IBD SDAC 101 36,140 - - 62.7% 74% 0.84 No ABS (2004-5)99 Australia 2004-5 IBD NHS 65 25,841 43 44% 65% 74% 0.87 No IBD IBD -Register 2,476 14,177 42 45% 59% 68% 0.86 Age


Bernstein (2001)97


Canada 1995-96 IBD Health


Administration data linked with census


80 26,082 35.9 48% 67% 77% 0.87 Age


Longobardi (2003a)107


Canada 1999 IBD


Canadian National Population Health Survey (NPHS)


187 10,704 42.7 37% 71% 82% 0.87 Various


Longobardi (2003b)108


US 1999 IBD


National Health Interview Survey (NHIS)


187 23,462 42.2 34% 68% 85% 0.8 Various


Sorensen (1987)104


Denmark 1984 CD


Hospital recruited


106 75


44 65% 65% 64% 1.02 None CD


Boonen (2002)102


Netherlands 2000 UC Hospital Register 282 1,504 37.3 38% 62% 70% 0.89 Age 359 1,504 43.6 52% 69% 73% 0.95 Age


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