Table 1.

Comparing mPAP with reference PAP testing

	HR1a			HR2b
	Positive reference PAP	Negative reference PAP	Total	Positive reference PAP	Negative reference PAP	Total
Positive mPAP	4	0	4	12	1	13
Negative mPAP	4	135	139	25	105	130
Total	8	135	143	37	106	143

^aHR1 definition of heteroresistance: growth of a resistant subpopulation of cells at 4 and 8 mg/L of colistin at a frequency of at least 1 × 10⁻⁶ the main population grown on antibiotic-free media.

^bHR2 definition of heteroresistance: growth of a resistant subpopulation of cells at a colistin concentration ≥8× higher than the main population, at a frequency of at least 1 × 10⁻⁷.