The results of this study seem to indicate that sleeping in the same room as parents and habits of feeding to sleep etc may contribute to lessor sleep quality in infants.

“Mean TST was 13h36min including 2h54min of naps; 20% of the infants had TST ≤12h/24h. About 46% did not present SOD or NW, 16% had frequent SODs and 22% had NW >1 night in 2. Parental presence, feeding to fall asleep and infant sleep arrangements were frequent in infants with short sleep duration (≤12h/24h), NW and SODs. Non-nutritive sucking was associated with risk of NW, SOD and TST >14h/24h. Parental room sharing was associated with NW.”

https://www.sciencedirect.com/science/article/abs/pii/S1389945719316417