Table 1.

Risk ratios and estimated number of additional counts due to exposure

Potential public health threat	Syndromic system/indicator	Risk ratio of direct effect	95% confidence interval	Estimated number of additional healthcare counts
1. Mumps outbreak	GP in-hours consultations for mumps	11.5	(4.08, 48.28)	53
2. G7 summit	ED attendances	1.05	(0.95, 1.16)	Not significant
3. Thunderstorm asthma	NHS 111 online assessments for difficulty breathing	4.86	(4.05, 5.83)	700.3
4. Industrial fire	NHS 111 calls for difficulty breathing	1.78	(1.13, 6.35)	2.6