The phrase "also found that levels" is correct and usable in written English.
It can be used in research or analytical contexts when discussing findings related to measurements or quantities.
Example: "The study also found that levels of pollution increased significantly during the summer months."
Alternatives: "also discovered that levels" or "also identified that levels".
But, interestingly, they also found that levels of gratefulness seemed to have no impact on PTSD symptoms at five months.
Importantly we also found that levels of formaldehyde correlated with the levels of limonene.
Esterbauer's team also found that levels of the HO-1 protein were slightly higher in healthy obese subjects than in the lean controls.
The researchers also found that levels of tolerance differed in the various engineering subfields: biological and chemical engineering were perceived as the most tolerant while mechanical, aerospace, and civil engineering were perceived as the least.
The WMO report also found that levels of CFCs - which destroy Earth's protective ozone layer - have continued to decrease, further confirming that the global CFC emission cuts under the 1987 Montreal Protocol are effectively reversing the damage.
In males, we also found that levels of the unbound form of the thyroid hormone triiodothyronine (T3) were positively correlated with plasma BDNF levels.
They also found that level of knowledge was higher in young respondents with higher education level and higher annual household income [ 27].
Using logistic regression, we also found that initial level of depressive symptoms significantly (p = .0330) predicted the first episode of depression and/or dysthymia among TAU subjects.
Using a blank spectrum, we can also find that low-level polynomials (<3) are enough to fit baseline information.
We also find that serum Hcy levels were not significantly different from the other groups.
Saliva samples also found that that levels of the stress hormone cortisol were significantly higher among boys who smoked.
