Table 1.
Preincubation times for negative blood culture bottles for all study sites and incubation (INC) and total detection times (TDT) for positive blood culture bottles for all study sites.
| SITE | Baseline characteristics | Negative blood culture bottles | Positive blood culture bottles | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dist. (km) | Hours | Runs | N | Mn | Md | TT90% | > 24 h | N | POS % | CONT % | Mn INC | Mn TDT | |
| RMRL site | 0 | 24 h | – | 19,610 | 1.5 | 1.1 | 2.6 | 0.14 | 3577 | 12.92 | 2.5 | 21.31 | 22.99 |
| Cluster 1, site A | 10.9 | 24 h | 12 | 11,736 | 3.8 | 3.4 | 5.9 | 0.19 | 2316 | 13.38 | 3.1 | 21.39 | 25.18 |
| Cluster 1, site B | 12.3 | 24 h | 10 | 8533 | 4.2 | 3.9 | 6.5 | 0.11 | 1338 | 11.19 | 1.9 | 18.18 | 22.32 |
| Cluster 1, site C | 7.9 | 24 h | 9 | 5373 | 4.0 | 3.8 | 6.2 | 0.04 | 1078 | 14.54 | 2.2 | 19.06 | 23.08 |
| Cluster 1, site D | 10.6 | 24 h | 12 | 2129 | 3.8 | 3.4 | 5.7 | 0.14 | 348 | 10.4 | 3.7 | 23.58 | 27.24 |
| Cluster 1, site E | 0.5 | 6h30-22h00 | 13 | 540 | 3.1 | 2.8 | 5.6 | 0.00 | 61 | 7.14 | 3.0 | 22.78 | 25.85 |
| Cluster 1, site F | 1.8 | 24 h | 8 | 214 | 3.1 | 2.9 | 4.6 | 0.00 | 17 | 6.93 | 0.4 | 17.61 | 20.77 |
| Cluster 2, site A | 97 | 24 h | 4 | 4096 | 9.6 | 7.6 | 17.3 | 0.07 | 556 | 10.98 | 1.0 | 16.98 | 26.44 |
| Cluster 2, site B | 104 | 24 h | 3 | 1277 | 9.2 | 7.6 | 16.7 | 0.00 | 183 | 10.55 | 2.0 | 19.44 | 29.27 |
| Cluster 3, site A | 151 | 24 h | 3 | 1734 | 13.7 | 13.2 | 20.8 | 0.86 | 275 | 13.37 | 0.3 | 15.28 | 29.23 |
| Cluster 3, site B | 46.9 | 6h00-23h00 | 3 | 893 | 12.6 | 12.6 | 21.0 | 2.22 | 253 | 18.3 | 3.7 | 17.39 | 30.82 |
| Cluster 3, site C | 101 | 24 h | 2 | 680 | 12.0 | 10.0 | 20.1 | 0.91 | 108 | 12.82 | 0.9 | 14.93 | 25.04 |
| Cluster 3, site D | 71.8 | 7h00-23h00 | 2 | 662 | 12.4 | 10.4 | 21.0 | 4.98 | 77 | 10.15 | 0.3 | 10.14 | 22.71 |
| Cluster 4, site A | 63.7 | 7h00-23h00 | 2 | 351 | 14.1 | 16.4 | 22.5 | 4.84 | 101 | 20.58 | 1.8 | 15.32 | 30.42 |
| Cluster 4, site B | 93.2 | 6h30-20h00 | 2 | 311 | 13.8 | 15.2 | 23.7 | 8.36 | 72 | 18.54 | 0.3 | 15.45 | 28.55 |
| Cluster 4, site C | 59.6 | 7h00-23h00 | 1 | 279 | 13.5 | 15.1 | 22.4 | 6.76 | 49 | 14.24 | 0.6 | 13.68 | 26.53 |
| Cluster 4, site D | 56.4 | 6h30-22h30 | 2 | 265 | 14.3 | 15.5 | 24.8 | 13.21 | 51 | 13.29 | 2.8 | 17.08 | 30.02 |
| Cluster 4, site E | 196 | 7h30-23h00 | 2 | 194 | 14.1 | 15.2 | 21.2 | 1.52 | 22 | 9.09 | 1.4 | 12.57 | 25.57 |
| Cluster 5, site A | 195 | 7h00-23h00 | 1 | 200 | 18.7 | 22.7 | 29.3 | 39.90 | 45 | 15.32 | 2.8 | 14.12 | 32.66 |
Time values are listed in hours and sites are presented in reverse order of testing volume. INC is defined as time from insertion into the automated blood system to growth detection and TDT is defined as time from collection to growth detection. The lowest and highest values for POS %, Mn INC and Mn TDT are presented in bold for emphasis. Dist: distance, N: number, Hours: hours of operation, Runs: daily number of couriers, Mn: mean, Md: median, TT90%: time to reception of 90% of samples, > 24 h: percentage of samples received after 24 h for each sites, POS %: monomicrobial blood culture positivity rate, CONT %: contamination rate.