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. 2005 Jun;20(6):515–519. doi: 10.1111/j.1525-1497.2005.0076.x

Table 4.

Stratum-specific Likelihood Ratios for Self-reported Erectile Dysfunction Predicting Erectile Dysfunction by Urologic Examination, Massachusetts Male Aging Study (N=137)

Self-reported ED ED by Urologic Examination Likelihood Ratio* 95% Confidence Interval
Yes No
N % N %
None 9 8.7 25 75.8 0.11 0.06 to 0.22
Minimal 28 26.9 6 18.2 1.48 0.67 to 3.26
Moderate 27 26.0 1 3.0 8.57 1.21 to 60.65
Complete 40 38.5 1 3.0 12.69 1.81 to 88.79
Total 104 100.0 33 100.0
*

Likelihood ratio (i.e., SSLR) computed by the formula, where x1 is the number of men in a particular self-reported ED stratum with ED by urologic examination, n1 is the total number with ED by urologic examination, x0 is the number of men in the same self-reported ED stratum without ED by urologic examination, and n0 is the total number of men without ED by urologic evaluation

ED, erectile dysfunction; SSLR, stratum-specific likelihood ratio