The phrase "also preliminary" is correct and usable in written English.
It can be used when referring to something that is initial or introductory in nature, often in the context of research or planning.
Example: "The findings presented in this report are also preliminary and subject to further validation."
Alternatives: "initially" or "tentative".
There are also preliminary indications that wages, stagnant for some time, are about to rise as companies hire more aggressively.
There are also preliminary signs that the data from 2010 may indicate the end of the good news.
The results so far are encouraging but also preliminary, and researchers caution against reading too much into these small-scale studies.
This would be bad enough for the American waistline, but there's also preliminary research suggesting that high-fructose corn syrup is metabolized differently than other sugars, making it potentially more harmful.
Also, preliminary results from a study by Yale medical school researchers showed that babies born to women who got flu shots during pregnancy were hospitalized less often than babies whose mothers did not.
Sanofi and Regeneron say there are also preliminary signs dupilumab works against the skin condition atopic dermatitis, suggesting it can be blocking a biological pathway that contributes to multiple allergic conditions.
Also: preliminary data in predoc proposals?
We present the design of both services and also preliminary performance results.
Variation of conducting donor polymers in this new structure is also preliminary demonstrated.
There is also preliminary evidence of atypical connectivity in the default mode network and its interaction with other RSNs.
Also preliminary experiments (results not shown) indicated better signals of OTPs of E1 with atmospheric pressure chemical ionization (APCI) than with electrospray ionization.
