The phrase "studies that conducted" is correct and can be used in written English.
It can be used when referring to empirical studies that have been conducted in the past. For example, "This article analyzes the results of three studies that conducted experiments on the effects of second-language learning."
In the following comparisons, we only include studies that conducted some type of statistical analysis to determine a relationship between constructs.
For examples of studies that conducted such research, see Lieberman et al. (1993) and Duda and Palumbi (1999); evidence seems to suggest that different groups may show different patterns.
This was an advantage compared to previous studies that conducted periodic checks for nests, discovered nests at various stages, estimated failure date because nests were only periodically rechecked, and used an exponent to account for survival across differing interval lengths (i.e., logistic-exposure model; Shaffer 2004).
Among the 30 studies that conducted blind experiments, 18 were double-blind.
We included studies that conducted statistical analyses of several potential drivers that ranged from income to demographics to location.
We only included studies that conducted meta-analyses to obtain summary estimates and evaluated heterogeneity between different studies.
Future studies that conduct more extensive analyses for risk factors, such as antimicrobial drug use, travel destination, and duration of travel, would benefit from larger populations.
An observational study that conducted on 80 patients with SLE to evaluate the vitamin D insufficiency and deficiency, recommended oral vitamin D3 in patients with low baseline 25(OH D levels [51].
SEARCH is a multicenter study that conducts population-based ascertainment of nongestational cases of physician-diagnosed diabetes in youth.
SEARCH is a multicenter study that conducts population-based ascertainment of newly diagnosed cases of nongestational diabetes in youths aged <20 years (4).
It is a large prospective cohort study that conducts annual waves of data collection using a national database of all Australian doctors (https://mabel.org.au/).au/
