Table 3 Predictive values of clinical symptoms*
Laboratory-confirmed diagnosisDiagnostic agreement % (95% CI)
Yes (%)NoTotalSensitivitySpecificityPPVNPV
Women
Vaginal discharge
T vaginalis vaginitis
    Yes12 (13)799137.5 (21 to 56)72.8 (67 to 78)13.2 (7 to 22)91.3 (87 to 95)
    No20 (9)211231
Cervicitis†
    Yes14 (15)779141.2 (26 to 59)73.3 (68 to 78)15.4 (9 to 25)91.3 (87 to 95)
    No20 (9)211231
Men
Urethritis‡
Dysuria and/or urethral discharge
    Yes9 (12)657433.3 (17 to 54)85.8 (82 to 89)12.2 (8 to 22)95.6 (93 to 97)
    No18 (4)394412
  • NPV, negative predictive value; PPV, positive predictive value.

  • *Based on subjects with complete data (322 women, 486 men). †Includes gonococcal and non-specific cervicitis. ‡Includes gonococcal and non-specific urethritis.