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Choose Chart Chart 1: Lumbar Fusion Procedures Chart 01A: Lumbar Fusion Procedures by SSA Chart 01B: Lumbar Disc Surgery w/o Fusion by SSA Chart 2: Lumbar Disc Surgery Chart 3: Back & Neck Procedures Chart 4: Total Knee Replacement Chart 5: Total Hip Replacement Chart 6: Hysterectomy Chart 7: Carotid Endarterectomy Chart 8: Adult Medical Conditions Chart 9: Cardiology Medicine Chart 10: Digestive Medicine Chart 11: Respiratory Medicine Chart 12: ACSC Discharges Chart 13: Mortality Rates 2001 Chart 14: Adverse Effects 2001 Chart 15: Wound Infections 2001 Chart 16: Pneumonia 2001 Chart 17: Urinary Infections 2001 Chart 18: Mechanical Complications 2001 Chart 19: Pulmonary Compromise 2001 Chart 20: OB Complications 2001 Chart 21: Mortality Rates 2002 Chart 22: Adverse Effects 2002 Chart 23: Wound Infections 2002 Chart 24: Pneumonia 2002 Chart 25: Urinary Infections 2002 Chart 26: Mechanical Complications 2002 Chart 27: Pulmonary Compromise 2002 Chart 28: OB Complications 2002 Chart 29: Medical Condiitons vs High Blood Pressure Chart 30: Medical Conditions vs High Cholesterol Chart 31: Medical Conditions vs Asthma Chart 32: Medical Conditions vs Diabetes Chart 33 Demo Quality Chart 34 Demo Variation

Chart 4
Total Knee Replacement

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This information is adjusted for age so that the number of older people in a hospital service area does not affect the results. Remember only the orange bars give us information that is significant. Significant means that chance is not at work here. The residents of Greenville are having their joints replaced remarkably more often than we would expect.  There is likely to be an aggressive surgical philosophy at work here. Whether that philosophy is restricted to one surgeon or spread over a community of surgeons is not knowable.  Residents of those areas with positive orange bars must realize that a second opinion as to the timing of surgery is important to obtain a balance view.

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

(Orange bars are statistically significant at the 95% confidence level or higher.)

AREA NAME	Signficance	Ratio: OBS/EXP	% Difference	AREA NAME
GREENVILLE	P<0.001	2.14	114%
BANGOR	P<0.001	1.28	28%
BLUE HILL	P<0.05	1.28	28%
DOVER-DEXTER	P<0.01	1.26	26%
RUMFORD	P<0.05	1.23	23%
MAINE TOTALS		1.00	0%
	P<0.01	0.92	-8%	PORTLAND
		0.84	-16%	PRESQUE ISLE
	P<0.001	0.80	-20%	ROCKLAND
	P<0.001	0.65	-35%	FORT KENT
	P<0.001	0.60	-40%	CARIBOU-VAN BUREN

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