Table 3 The profile of a new-positive SNAP test result for Borrelia burgdorferi infection, including preventative fraction and risk ratio assessment among incompletely and completely vaccinated dogs
2009 | 2010 | 2011 | 2012 | 2013 | |
|---|---|---|---|---|---|
Percent (+) of all tests run | 12.22% | 15.45% | 12.30% | 13.70% | 13.70% |
NEW (+) as % of all tests run | 5.90% | 7.86% | 5.60% | 7.01% | 6.10% |
Profile of a NEW (+) out of ALL new (+)’s | |||||
Incomplete-vaccination | 86.59% (71/82) | 89.52% (94/105) | 85.92% (61/71) | 86.08% (68/79) | 95.45% (63/66) |
Full-vaccination | 13.41% (11/82) | 10.48% (11/105) | 14.08% (10/71) | 13.92% (11/79) | 4.55% (3/66) |
Infection rate (IR) based on vaccine status*: | |||||
ALL incomplete-vaccination | 16.86% (71/421) | 32.08% (94/293) | 18.32% (61/333) | 23.13% (68/294) | 20.32% (63/310) |
Complete-vaccination | 1.13% (11/970) | 1.04% (11/1053) | 1.07% (10/933) | 1.32% (11/833) | 0.39% (3/762) |
Negative infection rate based on vaccine status | |||||
ALL incomplete-vaccination | 83.14% (350/421) | 67.92% (199/293) | 81.68% (272/333) | 76.87% (226/294) | 79.68% (247/310) |
Complete-vaccination | 98.87% (959/970) | 98.96% (1042/1053) | 98.93% (923/933) | 98.68% (822/833) | 99.61% (759/762) |
Chi-square test statistic | 130.95 | 307.01 | 137.89 | 158.56 | 151.47 |
P-value | <0.0001 | <0.0001 | <0.0001 | <0.0001 | <0.0001 |
Preventative fraction (PF) against infection** | 93.29% | 96.76% | 94.16% | 94.29% | 98.08% |
Risk ratio (RR)*** | 14.92 | 30.85 | 17.12 | 17.52 | 52.10 |