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Table 4 AUDIT-C thresholds for higher risk drinking (female)

From: Validation of the AUDIT-C in adults seeking help with their drinking online

AUDIT-C score Sensitivity  % (95% CI) Specificity  % (95% CI) LR+a (95% CI) LR−b (95% CI) Sensitivity + specificity % Correctly classified (95% CI)
≥2 99.92 (99.56, 100.0) 0.90 (0.36, 1.85) 1.01 (0.48, 2.11) 0.09 (0.01, 0.64) 100.82 62.45 (60.31, 64.55)
≥3 99.92 (99.56, 100.0) 1.29 (0.62, 2.35) 1.01 (0.55, 1.87) 0.06 (0.02, 0.24) 101.21 62.59 (60.46, 64.69)
≥4 99.76 (99.31, 99.95) 4.25 (2.94, 5.91) 1.04 (0.74, 1.45) 0.06 (0.02, 0.19) 104.01 63.61 (61.49, 65.70)
≥5 99.37 (98.77, 99.73) 11.71 (9.54, 14.18) 1.13 (0.93, 1.37) 0.05 (0.03, 0.10) 111.08 66.20 (64.10, 68.24)
≥6 96.71 (95.58, 97.62) 25.35 (22.33, 28.57) 1.30 (1.15, 1.47) 0.13 (0.10, 0.18) 122.06 69.70 (67.66, 71.69)
≥7 90.83 (89.11, 92.36) 44.40 (40.87, 47.98) 1.63 (1.50, 1.77) 0.21 (0.17, 0.25) 135.23 73.26 (71.29, 75.16)
≥8* 81.90 (79.67, 83.97) 61.90 (58.39, 65.33) 2.15 (2.02, 2.28) 0.29 (0.25, 0.34) 143.80 74.33 (72.38, 76.21)
≥9 60.97 (58.23, 63.66) 80.82 (77.88, 83.53) 3.18 (3.01, 3.36) 0.48 (0.41, 0.56) 141.79 68.49 (66.43, 70.49)
≥10 37.38 (34.72, 40.10) 92.79 (90.74, 94.51) 5.19 (4.82, 5.59) 0.67 (0.52, 0.87) 130.17 58.35 (56.19, 60.50)
  1. Drinking >35 units of alcohol in past week
  2. *The ‘optimal’ and most accurate AUDIT-C cut-off score for identifying higher risk drinkers
  3. aLR+ positive likelihood ratio
  4. bLR− negative likelihood ratio