Table 1.

Control package interventions and their measures of effect from intention-to-treat analysis adjusted for compliance to the individual intervention measure (adapted from [ 8])

Interventions allocated	A	B	C	Control
None				✓
No new animals brought in	✓	✓	✓
No contact with other cattle	✓	✓	✓
No shared water sources	✓	✓	✓
Keep bedding dry	✓		✓
Keep animals clean	✓		✓
Maintain closed group	✓		✓
Use boot-dip	✓		✓
Use overcoat	✓		✓
Clean water troughs weekly		✓	✓
Empty water troughs weekly		✓	✓
Risk ratio (95% CI)	0·14 (0·02–0·84)	0·80 (0·20–3·10)	0·77 (0·14–4·34)
P value	0·032	0·744	0·768

CI, Confidence interval.