Table 3.

Positive and Negative Predictive Values and Numbers of Episodes With and Without Endocarditis Stratified by Place of Acquisition and Time to Positivity in Hours

Time to Positivity, hEndocarditis, No. of EpisodesNo Endocarditis, No. of EpisodesPPV, % (95% CI)NPV, % (95% CI)
Whole cohort (N = 1702)
 TTP <10 (25th percentile)8433420 (17–23)95 (94–95)
 TTP >10701208
 TTP <13 (median)12072414 (13–15)96 (95–97)
 TTP >1334824
 TTP <17 (75th percentile)138113611 (10–11)96 (94–98)
 TTP >1716421
Community-onset (n = 1199)
 TTP <107524324 (21–28)95 (93–96)
 TTP >1047834
 TTP <1310048717 (16–19)96 (95–98)
 TTP >1322590
 TTP <1712277814 (13–14)97 (94–98)
 TTP >1710299
Community-acquired (n = 502)
 TTP <10509235 (30–41)95 (93–97)
 TTP >1018342
 TTP <136019723 (21–26)97 (94–98)
 TTP >138237
 TTP <176432017 (16–18)97 (92–99)
 TTP >174114
Healthcare-associated (n = 697)
 TTP <102716314 (11–18)95 (93–96)
 TTP >1027480
 TTP <134029012 (10–14)96 (94–98)
 TTP >1314353
 TTP <17484589 (9–10)97 (93–99)
 TTP >176185
Hospital-acquired (n = 503)
 TTP <109978 (5–14)95 (93–95)
 TTP >1023374
 TTP <13202378 (6–10)95 (93–97)
 TTP >1312234
 TTP <17263587 (6–8)95 (90–98)
 TTP >176113
Time to Positivity, hEndocarditis, No. of EpisodesNo Endocarditis, No. of EpisodesPPV, % (95% CI)NPV, % (95% CI)
Whole cohort (N = 1702)
 TTP <10 (25th percentile)8433420 (17–23)95 (94–95)
 TTP >10701208
 TTP <13 (median)12072414 (13–15)96 (95–97)
 TTP >1334824
 TTP <17 (75th percentile)138113611 (10–11)96 (94–98)
 TTP >1716421
Community-onset (n = 1199)
 TTP <107524324 (21–28)95 (93–96)
 TTP >1047834
 TTP <1310048717 (16–19)96 (95–98)
 TTP >1322590
 TTP <1712277814 (13–14)97 (94–98)
 TTP >1710299
Community-acquired (n = 502)
 TTP <10509235 (30–41)95 (93–97)
 TTP >1018342
 TTP <136019723 (21–26)97 (94–98)
 TTP >138237
 TTP <176432017 (16–18)97 (92–99)
 TTP >174114
Healthcare-associated (n = 697)
 TTP <102716314 (11–18)95 (93–96)
 TTP >1027480
 TTP <134029012 (10–14)96 (94–98)
 TTP >1314353
 TTP <17484589 (9–10)97 (93–99)
 TTP >176185
Hospital-acquired (n = 503)
 TTP <109978 (5–14)95 (93–95)
 TTP >1023374
 TTP <13202378 (6–10)95 (93–97)
 TTP >1312234
 TTP <17263587 (6–8)95 (90–98)
 TTP >176113

Abbreviations: CI, confidence interval; NPV, negative predictive value; PPV, positive predictive value; TTP, time to positivity.

Table 3.

Positive and Negative Predictive Values and Numbers of Episodes With and Without Endocarditis Stratified by Place of Acquisition and Time to Positivity in Hours

Time to Positivity, hEndocarditis, No. of EpisodesNo Endocarditis, No. of EpisodesPPV, % (95% CI)NPV, % (95% CI)
Whole cohort (N = 1702)
 TTP <10 (25th percentile)8433420 (17–23)95 (94–95)
 TTP >10701208
 TTP <13 (median)12072414 (13–15)96 (95–97)
 TTP >1334824
 TTP <17 (75th percentile)138113611 (10–11)96 (94–98)
 TTP >1716421
Community-onset (n = 1199)
 TTP <107524324 (21–28)95 (93–96)
 TTP >1047834
 TTP <1310048717 (16–19)96 (95–98)
 TTP >1322590
 TTP <1712277814 (13–14)97 (94–98)
 TTP >1710299
Community-acquired (n = 502)
 TTP <10509235 (30–41)95 (93–97)
 TTP >1018342
 TTP <136019723 (21–26)97 (94–98)
 TTP >138237
 TTP <176432017 (16–18)97 (92–99)
 TTP >174114
Healthcare-associated (n = 697)
 TTP <102716314 (11–18)95 (93–96)
 TTP >1027480
 TTP <134029012 (10–14)96 (94–98)
 TTP >1314353
 TTP <17484589 (9–10)97 (93–99)
 TTP >176185
Hospital-acquired (n = 503)
 TTP <109978 (5–14)95 (93–95)
 TTP >1023374
 TTP <13202378 (6–10)95 (93–97)
 TTP >1312234
 TTP <17263587 (6–8)95 (90–98)
 TTP >176113
Time to Positivity, hEndocarditis, No. of EpisodesNo Endocarditis, No. of EpisodesPPV, % (95% CI)NPV, % (95% CI)
Whole cohort (N = 1702)
 TTP <10 (25th percentile)8433420 (17–23)95 (94–95)
 TTP >10701208
 TTP <13 (median)12072414 (13–15)96 (95–97)
 TTP >1334824
 TTP <17 (75th percentile)138113611 (10–11)96 (94–98)
 TTP >1716421
Community-onset (n = 1199)
 TTP <107524324 (21–28)95 (93–96)
 TTP >1047834
 TTP <1310048717 (16–19)96 (95–98)
 TTP >1322590
 TTP <1712277814 (13–14)97 (94–98)
 TTP >1710299
Community-acquired (n = 502)
 TTP <10509235 (30–41)95 (93–97)
 TTP >1018342
 TTP <136019723 (21–26)97 (94–98)
 TTP >138237
 TTP <176432017 (16–18)97 (92–99)
 TTP >174114
Healthcare-associated (n = 697)
 TTP <102716314 (11–18)95 (93–96)
 TTP >1027480
 TTP <134029012 (10–14)96 (94–98)
 TTP >1314353
 TTP <17484589 (9–10)97 (93–99)
 TTP >176185
Hospital-acquired (n = 503)
 TTP <109978 (5–14)95 (93–95)
 TTP >1023374
 TTP <13202378 (6–10)95 (93–97)
 TTP >1312234
 TTP <17263587 (6–8)95 (90–98)
 TTP >176113

Abbreviations: CI, confidence interval; NPV, negative predictive value; PPV, positive predictive value; TTP, time to positivity.

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