Mental Health Questionnaire. Title of data: Questions used during the study “Knowledge, Attitudes and Practices regarding Depression among Primary Health Care Providers in Fako Division, Cameroon”. Description of data: The study was carried out using a 52 items structured questionnaire which was self-administered from July 2013 to December 2013. The questionnaire was divided into four main sections. Section one which collected information on the key socio-demographic variables of the PHCPs. Section two had 15 items to assess the knowledge of PHCPs about depression. Section four had 12 items on the practice about depression and prior training in mental health. The knowledge and practice items were selected from questions found in other studies [8, 15–18] and the questions were modified or rephrased for better understanding. Section three used the DAQ to assess the attitudes of the PHCPs to depression. The DAQ was originally devised for use in the United Kingdom and it has been used successfully by various health professionals in other developed countries [19–21] as well as in African settings [9, 22]. (DOCX 23 kb)