The phrase "additional data was collected" is correct and usable in written English.
It can be used in contexts where you are discussing research, analysis, or any situation where more information has been gathered.
Example: "In order to improve the accuracy of our findings, additional data was collected during the follow-up study."
Alternatives: "further data was gathered" or "supplementary data was obtained."
Additional data was collected for the control sample and after exposure to 3.5% w/v hydrogen peroxide, an agent for which B. pumilus SAFR-032 has resistance (Link et al. 2004; Gioia et al. 2007).
Additional data was collected during interviews with key informants.
All patients transferred from other countries were screened; additional data was collected on comorbidities, etc. Presence of carbapenemases of multidrug-resistant Gram-negatives was confirmed by PCR.
Additional data was collected retrospectively from the A&E records on which information was recorded contemporaneously at presentation of the head injured patients.
Additional data was collected at 6, 9, 12, 18 and 24 months post stroke for the primary outcome, participation, and several potential confounders.
In order to respond to donor´s concerns the baseline study that was done at the beginning of the project in 2006 (previous phases of projects GCP/MOZ/027/BEL and GCP/MOZ/079/BEL) was re-visited and additional data was collected in the districts covered by the project.
In addition to data available from the national documentation system, additional data were collected for this study in the screening clinic and at home visits.
Additional data are collected from experiments.
Additional data were collected to measure metabolic and inflammatory parameters.
Additional data were collected in a glacierized high-gradient Andean stream (Estero Morales) using a portable Bunte-type bedload sampler.
Additional data are collected in a 0.025 m inlet cyclone on the effect of increasing surfactant concentrations on foam stability and break-up efficiency.
