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Table 2 Validity comparisons for Coosto-detected MRSA outbreaks with SO-ZI/AMR as the reference standard

From: Social media posts and online search behaviour as early-warning system for MRSA outbreaks

MRSA outbreaks Number of days   Validity
TP FP FN TN   Se (95% CI) Sp (95% CI) PPV (95% CI) NPV (95% CI)
All 10 27 39 722   20 (10–34) 96 (95–98) 27 (16–42) 95 (92–96)
Any hospital 5 13 25 755   17 (6–35) 98 (97–99) 28 (13–50) 97 (96–97)
University hospital 0 1 8 791   0   100 (99–100) 0   99 (99–99)
General hospital 5 12 17 764   23 (8–45) 98 (97–99) 29 (14–52) 98 (97–98)
Any hospital and unknown location 6 12 33 747   15 (6–31) 98 (97–99) 33 (17–56) 96 (95–96)
University hospital and unknown location 0 1 17 783   0   100 (99–100) 0   98 (98–98)
General hospital and unknown location 6 11 25 756   19 (7–37) 99 (97–99) 35 (18–58) 97 (96–97)
Nursing home 1 15 6 778   13 (0–53) 98 (97–99) 6 (1–31) 99 (99–99)
Nursing home and unknown location 2 14 14 770   13 (2–38) 98 (97–99) 13 (3–37) 98 (98–99)
Other location 0 3 3 795   0   100 (99–100) 0   100 (100–100)
Other location and unknown location 0 3 12 786   0   100 (99–100) 0   99 (98–99)
  1. CI confidence interval, FN false negative, FP false positive, NPV negative predictive value, PPV positive predictive value, Se sensitivity, Sp specificity, TN true negative, TP true positive