The phrase "a side study of" is correct and usable in written English.
It can be used when referring to a secondary or supplementary examination of a particular subject or topic.
Example: "The researchers conducted a side study of the effects of sleep on cognitive performance."
Alternatives: "a supplementary study of" or "an ancillary study of".
As a side-study of the NELSON project, we randomly selected 400 out of 4,280 baseline CTs from 2005 using a statistical program (SPSS 16.0 for Windows, SPSS, Inc., Chicago, IL, USA).
This is similar to the results as found after 1 year of therapy in the US Oncology side study of the TEAM trial concerning menopausal symptoms [ 10].
A 30-year side-by-side study of conventional and organic agriculture concludes that organic is better by every measure.
At the Morgan two side-by-side studies of a seated male on a single sheet of paper illustrate the transition between these realms.
This side study concerned an analysis of category II and III solid nodules (15 500 mm, effective diameter 3.1 9.8 mm) according to the NELSON classification [ 9].
Studies on Golgi apparatus are still rare (Bouchet-Marquis et al. 2008), and very often published images of vitrified Golgi stacks are a side result of studies on special cell types or tissues (Henderson et al. 2007; Gruska et al. 2008).
The findings further suggest that designing a series of side studies within the "longitudinal paradigm" does not severely damage the study's validity in terms of selective attrition.
Matisse's Nu au bord de la mer, valued at €4m to €6m, hangs on one side, a gorgeous study of a naked woman, black outlines curving over her bare tummy.
On the other side, a recent study of trout in HAL documented that 15% of individuals aged between 1 and 3 years and with a length exceeding 12 cm left the lake and would potentially undertake migration to the sea, whereas 40% migrated into the lake and 44% remained in the tributaries [ 78].
