Table 1.

Mean Number of Additional Cases and Number Needed to Test in the Selected Communities Under Different Test Allocation Strategies, December 26, 2021, to July 23, 2022

	No. of Additional Cases		NNT
	Mean No. of Additional Cases	Relative to Perfect Knowledge of Future Positivity	Mean NNT	Relative to Perfect Knowledge of Future Positivity
Simplest model most recent positivity ($\mathit{\text{\%}}\mathit{p}\mathit{o}{\mathit{s}}_{\mathit{i},\mathit{t}}$) only (OLS)	985	0.887	19.3	1.263
Best model most recent positivity ($\mathit{\text{\%}}\mathit{p}\mathit{o}{\mathit{s}}_{\mathit{i},\mathit{t}}$) + most recent tests per 100 ($\mathit{t}\mathit{e}\mathit{s}\mathit{t}\mathit{s}\mathit{p}\mathit{e}\mathit{r}{100}_{\mathit{i},\mathit{t}}$) (mixed-effects model with community-specific intercepts)	994	0.895	19.0	1.241
Perfect knowledge of future positivity ($\mathit{\text{\%}}\mathit{p}\mathit{o}{\mathit{s}}_{\mathit{i},\mathit{t}+2}$)	1110	1.000	15.3	1.000
Random selection	565	0.509	43.8	2.864

Abbreviations: NNT, number needed to test; OLS, ordinary least squares.