The phrase "a threefold increase in reported" is correct and usable in written English.
It can be used when discussing statistical data or changes in quantities, particularly in contexts involving growth or escalation.
Example: "The study revealed a threefold increase in reported cases of the disease over the past year."
Alternatives: "a three times rise in reported" or "a threefold rise in reported".
People aged 80 and over had a threefold increase in risk of reporting poorer functionality.
For instance, a threefold increase in reproductive fitness has been reported over 84 generations in the dipteran fly Drosophila (Gilligan and Frankham 2003).
Kumar et al. similarly reported elevated placental PHLDA2 in relation to fetal growth restriction, and Diplas et al. reported a threefold increase in placental PHLDA2 in very LBW babies (Kumar et al., 2012; Diplas et al., 2009).
The United States 2000 census reported a threefold increase in undocumented Ecuadoreans in the United States over the previous decade, a rate matched by few other countries.
In semi-arid regions of West Africa, on a scale of 2 km2, Favreau et al. (2009) reported a threefold increase in surface runoff even though rainfall had decreased by approximately 23% from 1970 to 1980.
Mexico has reported a threefold increase in immigration detentions of Cubans from 2014 to 2015.
Furthermore, a study of a Swedish nationally representative survey reported a threefold increase in the prevalence of polypharmacy as defined by the use of five or more drugs from 18%% in 1992 to 42 % in 2002 [ 18].
Other microenvironmental evidence includes a study reporting a threefold increase in cycling among employees at Manchester Airport, England, attributed to a Workplace Travel Plan that included increased car parking charges, and other reports that those Workplace Travel Plans which included car-sharing financial incentives had the greatest chance of reducing car use.
For example, it has been reported that there is a threefold increase in PG levels in the endometrium between the follicular and luteal phases, which increases further during menstruation.
Previous reports have indicated a threefold increase in the concentration of DON in DDGS relative to starting material [ 39].
