|
Risk factors
|
Regression coefficient
|
Standard error
|
Hazard ratio
|
95% CI
|
|---|
|
Prior risk of Giardia
| | | | |
|
Low risk
|
0
| |
1.0
| |
|
Moderate risk
|
0.328
|
0.109
|
1.4
|
1.1, 1.7
|
|
High risk
|
0.620
|
0.110
|
1.9
|
1.5, 2.3
|
|
Season of the year
| | | | |
|
Summer
|
0
| |
1.0
| |
|
Winter
|
0..058
|
0.080
|
1.1
|
0.9, 1.2
|
|
Spring
|
-0.266
|
0.083
|
0.7
|
0.6, 0.9
|
- Low risk= Herds shedding neither Giardia or Cryptosporidium prior to start of the study
- Intermediate risk= Herd shedding Giardia only prior to the start of the study
- High risk= Herd shedding both Giardia and Cryptosporidium prior to the star of the study
- Winter= November through March
- Spring= April through June
- Summer= July through October
