Volume 3, Number 3—September 1997
Dispatch
Using Laboratory-Based Surveillance Data for Prevention: An Algorithm for Detecting Salmonella Outbreaks
Table 2
Sensitivity and specificity for 1993 of the Salmonella outbreak detection algorithm and of known outbreaks of Salmonella serotype Enteritidis
| ST | Sensitivity
No. flagged wks/No. outbreaks (%) |
Specificity
No. nonflagged wks/No. possible nonflagged wks (%) |
False positive (Pf+)
nonoutbreak flags/No. flags (%) |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean 5 wks | Mean 15 wks | Median 5 wks | Mean 5 wks | Mean 15 wks | Median 5 wks | Mean 5 wks | Mean 15 wks | Median 5 wks | |
| AK | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| AZ | 0/0 | 0/0 | 0/0 | 51/52 (98) | 51/52 (98) | 51/52 (98) | 1/1 (1) | 1/1 (1) | 1/1 (1) |
| AR | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| CO | 0/0 | 0/0 | 0/0 | 51/52 (98) | 51/52 (98) | 51/52 (98) | 1/1 (1) | 1/1 (1) | 1/1 (1) |
| CT | 5/6 (83) | 5/6 (83) | 5/6 (83) | 39/46 (85) | 39/46 (85) | 36/46 (78) | 4/9 (44) | 5/10 (50) | 16/21 (76) |
| DE | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| DC | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| FL | 0/1 | 0/1 | 0/1 | 51/52 (98) | 51/52 (98) | 51/52 (98) | 1/1 (1) | 1/1 (1) | 1/1 (1) |
| GA | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| HI | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| ID | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| IL | 1/1 (100) | 1/1 (100) | 1/1 (100) | 16/25 (64) | 16/25 (64) | 6/25 (24) | 11/12 (92) | 11/12 (92) | 22/23 (96) |
| IN | 0/0 | 0/0 | 0/0 | 45/52 (87) | 45/52 (87) | 44/52 (85) | 7/7 (1) | 7/7 (1) | 8/8 (1) |
| IA | 1/1 (100) | 1/1 (100) | 1/1 (100) | 51/51 (100) | 51/51 (100) | 51/51 (100) | 0/1 (0) | 0/1 (0) | 0/1 (0) |
| KS | 1/1 (100) | 1/1 (100 ) | 1/1 (100) | 51/51 (100) | 51/51 (100) | 51/51 (100) | 0/1 (0) | 0/1 (0) | 0/1 (0) |
| KY | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| LA | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| MD | 3/4 (75) | 3/4 (75) | 4/4 (100) | 44/48 (92) | 43/48 (90) | 31/48 (65) | 1/4 (25) | 2/5 (40) | 16/20 (80) |
| MA | 0/0 | 0/0 | 0/0 | 47/52 (90) | 47/52 (90) | 43/52 (83) | 5/5 (1) | 5/5 (1) | 9/9 (1) |
| MI | 0/0 | 0/0 | 0/0 | 45/52 (87) | 45/52 (87) | 43/52 (83) | 7/7 (1) | 7/7 (1) | 9/9 (1) |
| MN | 0/0 | 0/0 | 0/0 | 46/52 (88) | 46/52 (88) | 46/52 (88) | 6/6 (1) | 6/6 (1) | 6/6 (1) |
| MO | 0/0 | 0/0 | 0/0 | 51/52 (98) | 51/52 (98) | 51/52 (98) | 1/1 (1) | 1/1 (1) | 1/1 (1) |
| NV | 0/0 | 0/0 | 0/0 | 51/52 (98) | 51/52 (98) | 51/52 (98) | 1/1 (1) | 1/1 (1) | 1/1 (1) |
| NH | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| NJ | 1/2(50) | 1/2(50) | 2/2 (100) | 44/50 (88) | 44/50 (88) | 28/50 (56) | 6/7 (86) | 6/7 (86) | 22/24 (92) |
| NM | 0/0 | 0/0 | 0/0 | 48/52 (92) | 48/52 (92) | 48/52 (92) | 4/4 (1) | 4/4 (1) | 4/4 (1) |
| NY | 7/10 (70) | 7/10 (70) | 8/10 (80) | 41/42 (98) | 40/42 (95) | 35/42 (83) | 7/7 (0) | 7/7 (0) | 10/18 (56) |
| ND | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| OH | 0/0 | 0/0 | 0/0 | 45/52 (87) | 44/52 (85) | 41/52 (79) | 7/7 (1) | 8/8 (1) | 11/11 (1) |
| OK | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| OR | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| PA | 1/1 (100) | 1/1 (100) | 1/1 (100) | 3/3 (100) | 3/3 (100) | 3/3 (100) | 0/1 (0) | 0/1 (0) | 0/1 (0) |
| RI | 0/0 | 0/0 | 0/0 | 50/52 (96) | 50/52 (96) | 50/52 (96) | 2/2 (1) | 2/2 (1) | 2/2 (1) |
| SC | 1/1 (100) | 1/1 (100) | 1/1 (100) | 51/51 (100) | 51/51 (100) | 51/51 (100) | 1/1 (0) | 1/1 (0) | 1/1 (0) |
| SD | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| TN | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| TX | 2/2 (100) | 2/2 (100) | 2/2 (100) | 48/50 (96) | 48/50 (96) | 48/50 (96) | 3/5 (60) | 3/5 (60) | 3/5 (60) |
| UT | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| VT | 5/6 (83) | 5/6 (83) | 5/6 (83) | 43/46 (93) | 43/46 (93) | 43/46 (93) | 4/9 (44) | 4/9 (44) | 5/10 (50) |
| VA | 0/1 (0) | 0/1 (0) | 0/1 (0) | 43/51 (84) | 43/51 (84) | 35/51 (69) | 8/8 (1) | 9/9 (1) | 16/16 (1) |
| WV | 0/0 | 0/0 | 0/0 | 52/52 (100) | 52/52 (100) | 52/52 (100) | |||
| WI |
1/1 (100) |
1/1 (100) |
1/1 (100) |
40/51 (78) |
40/51 (78) |
38/51 (75) |
12/13 (92) |
12/13 (92) |
14/15 (93) |
| Total | 29/38 (76) | 29/38 (76) | 32/38 (82) | 1978/2072 (95) | 1975/2072 (95) | 1909/2072 (92) | 92/121 (76) | 96/125 (77) | 178/210 (85) |
