At the link below you will find a very recent study made by Support to Life Association (Hayata Destek Derneği) under the supervison of Prof. Dr. Ayhan Kaya, Director of the European Institute of Istanbul Bilgi University. The study is an extensive one conducted with Syrian refugees residing in Istanbul and the local communities in six different districts of the city.
Ayhan Kaya and Aysu Kıraç (2016). Vulnerability Assessment of Syrian Refugees in Istanbul. Istanbul: Hayata Destek Derneği