Table 4.

Pairwise comparison of FluDETECT positive sample proportions for different sample pooling schemes for RT-PCR positive samples (i.e., those with CT ≤ 35) using one-sided Fisher’s exact test

Subtype	Pool size	Fraction FluDETECT positive (%): Fraction for 11-swab pools (%)a	Fisher’s test: AC positive greater for 11-swab pools
H5 and H7	5 or 6	118/260 (45.4%): 48/138 (34.8%)	0.026
	5	57/129 (44.2%): 48/138 (34.8%)	0.074
	6	61/131 (46.6%): 48/138 (34.8%)	0.033
H5	5 or 6	35/113 (31.0%): 17/69 (24.6%)	0.228
	5	17/60 (28.3%): 17/69 (24.6%)	0.391
	6	18/53 (34.0%): 17/69 (24.6%)	0.177
H7	5 or 6	83/147 (56.5%): 31/69 (44.9%)	0.075
	5	40/69 (58.0%): 31/69 (44.9%)	0.086
	6	43/78 (55.1%): 31/69 (44.9%)	0.142

^aIn parentheses is the FluDETECT positive fraction for pools of size 11 for that subtype grouping