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Table 6 Sensitivity and specificity of each cut-off value for the risk score for low back pain with the exclusion of the Thai ERIQ

From: Development of a risk score for low back pain in office workers - a cross-sectional study

Cut-off value Sensitivity Specificity PPV NPV
≥ 1 100.0 1.9 56.0 100.0
≥ 2 98.4 12.3 58.3 86.4
≥ 3 88.5 33.1 62.3 69.9
≥ 4 79.7 57.8 70.2 69.5
≥ 5 63.0 69.5 72.0 60.1
≥ 6 44.3 83.8 77.3 54.7
≥ 7 23.4 95.5 86.5 50.0
≥ 8 6.8 98.1 81.2 45.8
≥ 9 0.5 100.0 100.0 44.6