Consider factors such as CADR ratings, coverage area, noise level, design, and cost-effectiveness when evaluating different air purifiers
One such method requires frequency counts in each exposure group and assumes that adjusted relative risks are similar to unadjusted ones.88 However, frequency data were not reported for many studies, and it is essential to use age adjusted relative risks because age is an important confounder for cardiovascular disease
How could this small change make such a big difference
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However, its performance was just average in our purifying tests, and its smart features aren't very robust