Fig. 3From: Development and validation of a pre-scoring system for nonspecific low back pain among general population in Guangzhou: a cross-sectional studyCalibration plot about observed versus estimated risk for NLBP in the development dataset and validation dataset respectively. a Calibration plot (Histogram) about observed risk versus estimated risk for NLBP in the development dataset with risk divided into ten groups by default. b Calibration plot (Histogram) about observed risk versus estimated risk for NLBP in the validation dataset with risk divided into ten groups by default. c Calibration plot (Line graph) about observed risk versus estimated risk for NLBP in the development dataset and validation dataset. The points with different colors indicate the observed risk against estimated riskBack to article page