Table 1 Results of segmented regression analysis of human brucellosis by expanded surveillance of bovine brucellosis in beef cattle and adding diagnostic methods for the case definition of human brucellosis
Parameter | Valuea | 95% Confidence Interval | p-value |
|---|---|---|---|
Pre-intervention phase | |||
Pre-intervention slope (secular trend, per month) | 0.14 | 0.10 to 0.18 | < 0.01 |
Intervention 1 | |||
Change in level (immediate effect) | 0.76 | 0.20 to 1.32 | 0.18 |
Change in slope (gradual effect per month) | −0.17 | − 0.25 to − 0.09 | 0.03 |
Intervention 2 | |||
Change in level | 1.94 | 1.40 to 2.53 | < 0.01 |
Change in slope | −0.19 | − 0.28 to − 0.10 | 0.04 |
Intervention 3 | |||
Change in level | −1.02 | −1.51 to −0.53 | 0.04 |
Change in slope | 0.20 | 0.14 to 0.26 | < 0.01 |