Patterns of use of flexible sigmoidoscopy, colonoscopy and gastroscopy: Regional variations in endoscopy rates

To examine regional variations in gastroscopy and colonoscopy rates, three-year average rates for 1994 to 1996 and 1999 to 2001 were calculated for each health region and the province as a whole. Figure 5 shows the 95% CIs for the gastroscopy and colonoscopy rate for 1999 to 2001 for each health region. In each three-year time period, there were marked variations in regional rates that exceeded what would be expected by chance alone (P<0.0001 for each period). There was a 3.3-fold difference between the highest and lowest regional gastroscopy rates in 1994 to 1996 and a 2.9-fold difference in 1999 to 2001.

There was a 2.8-fold difference between the highest and lowest regional colonoscopy rate in 1994 to 1996, but this fell to a twofold difference in 1999 to 2001. There was only a weak correlation between health regions’ colonoscopy and gastroscopy rates in either 1994 to 1996 (correlation coefficient: 0.46, P=0.08) or 1997 to 2001 (correlation coefficient: 0.43, P=0.11).

The ratio of the regions with the highest to lowest flexible sigmoidoscopy rate was 3.2 from 1994 to 1996 and 2.3 from 1999 to 2001. There was a strong negative correlation between regional colonoscopy and flexible sigmoidoscopy rates from 1994 to 1996 (correlation coefficient: -0.63, P=0.011) but less so in the later time period (correlation coefficient: -0.36, P=0.19).

Age-sex adjusted colonoscopy and gastroscopy rates

Figure 5) Age-sex adjusted colonoscopy and gastroscopy rates for Alberta health regions, 1999 to 2001. 95% CIs are shown for each region’s rates. The horizontal bar is the provincial rate. Significant regional variation exists for both gastroscopy and colonoscopy. Urban regions (Calgary and Capital) do not have consistently higher rates than more rural areas The best online pharmacy that deserves your trust and gives you best quality Buy Antidepressants Online here that you will always appreciate, not to mention all the other services available.

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