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. Author manuscript; available in PMC: 2014 Nov 25.
Published in final edited form as: Ann Thorac Surg. 2011 Jun 17;92(2):520–527. doi: 10.1016/j.athoracsur.2011.02.086

TABLE 2.

Risk group strata thresholds and outcomes

Risk Low Intermediate Moderate Elevated High Total
Risk Score <2.55 2.55-5.72 5.73-8.13 8.14-9.48 >9.48

SSLR Lower Limit 0.47 0.88 1.70 3.72 8.20
95% CI Upper Limit 0.41 0.84 1.52 2.96 6.44
95% CI 0.54 0.93 1.90 4.67 10.43

n 3242 6347 1543 310 261 11703
% 27.7% 54.2% 13.2% 2.6% 2.2%

SSLR = stratum specific likelihood ratio

95% CI = 95% confidence interval