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Chart 1
Lumbar Fusion Procedures

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This chart demonstrates that over a 5 year period lumbar fusion procedures were performed 124% more often than expected on residents of the Lewiston Hospital Service Area. This is one of the highest variations found over all procedures and activities in our study. This level of variation is very concerning to MQF and should be of concern to referring physicians and citizens. This information tells us that a very different surgical philosophy is at work here.

For an overview of how to read our Medical Variation Charts, click here.

Visual graphic for Variations in Admission Rates for Lumbar Fusion Procedures by Hospital Service Area - 1998-2002 chart
(Orange bars are statistically significant at the 95% confidence level or higher.)


AREA NAME Significance Ratio: OBS/EXP % Difference AREA NAME
LEWISTON P<0.001 2.24 124%
NORWAY P<0.01 1.74 74%
FARMINGTON P<0.05 1.51 51%
BRUNSWICK   1.26 26%
BOOTHBAY HARBOR   1.24 24%
MAINE TOTALS   1.00 0%
P<0.05 0.57 -43% ROCKLAND
P<0.001 0.50 -50% BANGOR
P<0.05 0.38 -62% DOVER-DEXTER
  0.37 -63% MACHIAS
P<0.05 0.20 -80% LINCOLN

You can also review the full table for the underlying data that supports this chart.


I. Variation Charts
chart 1 intro > chart 1 | ssa intro > chart 1A > chart 1B | chart 2 intro > chart 2 | chart 3 intro > chart 3 | chart 4 intro > chart 4
chart 5 intro > chart 5 | chart 6 intro > chart 6 | chart 7 intro > chart 7 | chart 8 intro > chart 8
chart 9 intro > chart 9 | chart 10 intro > chart 10 | chart 11 intro > chart 11
II. Quality Analysis Charts
chart 12 intro > chart 12 | chart 13 | chart 14 | chart 15 | chart 16 | chart 17 | chart 18 | chart 19 | chart 20 | chart 21
chart 22 | chart 23 | chart 24 | chart 25 | chart 26 | chart 27 | chart 28
III. Disease Burden Charts
chart 29 | chart 30 | chart 31 | chart 32
IV. Demo Chart Quality
chart 33
V. Demo Chart Variation
chart 34
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