Table 8. Sensitivity analysis for the level of reduction in prescriptions needed to protect 90+% of the length of the modelled River Thames catchment from resistance gene selection.

	% Reduction in Prescriptions	Number of reaches ‘at risk’ or ‘critical’	Length ‘at risk’ or ‘critical’ (km)	% Length ‘at risk’ or ‘critical’
Macrolides	80	69	110	7.9
	77	82	134	9.6
	76	86	157	11.2
	75	93	169	12.1
Fluoroquinolones	85	82	135	9.6
	84	88	157	11.2
	83	96	175	12.5
	80	118	215	15.4