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. 2015 Aug 20;128(16):2134–2140. doi: 10.4103/0366-6999.162514

Figure 2.

Figure 2

Calibration plot of nomogram by bootstrapping with 1000 resamples. Instructions for readers: The 45 line refers to perfect predictions. Points estimated below the 45 line refer to nomogram overprediction, whereas points situated above the 45 line refer to nomogram underprediction. A nonparametric, smoothed curve indicates the relationship between predicted probability and observed frequency of obstructive sleep apnea on polysomnography. Vertical lines indicate the frequency distribution of predicted probabilities.