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NNH is similar to number needed to treat (NNT), where NNT usually refers to a positive therapeutic result and NNH to a detrimental effect or risk factor. Marginal metrics: NNT for an additional beneficial outcome (NNTB) NNT for an additional harmful outcome (NNTH) are also used. [2]
A higher NNT indicates that treatment is less effective. [6] NNT is similar to number needed to harm (NNH), where NNT usually refers to a therapeutic intervention and NNH to a detrimental effect or risk factor. A combined measure, the number needed to treat for an additional beneficial or harmful outcome (NNTB/H), is also used.
NNT 1 / (CER − EER) 3.33 ... NNH 1 / (EER − CER) 10 Relative risk (risk ratio) RR EER / CER: 1.25 Relative risk increase RRI (EER − CER) / CER, or RR − 1
The railroad's primary traffic is quarried sand. It interchanges cars with CSX in Dover, New Hampshire ; the cars are then taken to the Boston Sand & Gravel plant in Charlestown, Massachusetts . Other than the Boston gravel train, NHN also serves its own satellite gravel facility in Rochester, New Hampshire , as well as Eastern Propane at the ...
3 NNT vs NNH? 2 comments. 4 References. 2 comments. 5 Worked example. 2 comments. 6 Request of examples. 3 comments. Toggle the table of contents. Talk: Number needed ...
The company initially began operations on a 9-mile (14 km) railroad line between North Stratford and Columbia, New Hampshire, previously operated by the North Stratford Railroad. [ 1 ] [ 3 ] The NHCR also has rights to operate two other lines in New Hampshire: the Groveton Branch between Groveton and Whitefield , and the Berlin branch between ...
It is a specific application of the number needed to treat metric (NNT). Derivation. NNV is the inverse of the absolute risk reduction of the vaccine.
1890 map of the national rail network. In United States railroading, the term national rail network, sometimes termed "U.S. rail network", [1] refers to the entire network of interconnected standard gauge rail lines in North America.