Merkouris et al.  comment that patient characteristics, attitudes and prior experiences formed a set of expectations about care which is the standard used by patients for judging the care they receive. Risser  associated expectations with perceptions, conceptualizing patient satisfaction as the degree of congruency between what the patient expects and what is offered by the nursing care.
Therefore patient satisfaction can be conceptualized as the patients’ subjective perception of what the caregivers (i.e. nurses) must regard as reality, even though this perception may disregard the appropriateness of therapy and outcomes of the patients’ health status. In addition, patients’ opinions are important because they are the best source of information to the providers in terms of what is important (i.e. for the nursing care), and this is the reason why this information can be used in health care planning and evaluation [4, 9].
Schmidt  found that a relationship existed between a patient’s perception of nursing care and the patient’s overall level of satisfaction during the hospital experience. The nurse is at the forefront of the care provided at the hospital, is responsible to provide direct care to patients, to organize and coordinate the care with other hospital services and comprises the major part of the health care staff . However, patient’s perception of satisfaction or dissatisfaction is not always merely a reflection of the nursing care provided . Patients have difficulties in dissociating their satisfaction with nursing care from their overall hospital experience satisfaction . So, it is of crucial importance that all health care professionals co-operate to improve care quality, in collaboration with the care-receivers [4, 13].
Preceding studies demonstrated high patient satisfaction with nursing care  which is related to good administrative support for nursing care, good relationships between nurses and physicians, and adequate staff numbers . Dissatisfaction or simply lack of satisfaction was associated to the lack of nursing control services [14, 16], nurse burnout , decrease of nursing staff [14, 17] and the inadequate amount of information provided by nurses .
Nowadays, nursing care is recognized as an area of health care where the patient is seen both as a client and as a consumer of health care services . Nursing evidence-based research and knowledge is needed to support the vital role they play in providing quality care to patients . So, it is crucial for nursing to develop valid and reliable instruments to measure patient satisfaction [13, 20].
Abdellah and Levile  back in the 50s developed the first instrument to measure patient satisfaction. More than 2 decades later, Risser  developed one of the first instruments, the Patient Satisfaction Scale–PSS, to measure patient satisfaction explicitly to the nursing care in the outpatient setting, incorporating three distinct dimensions of the care.
Although, there are several tools in the Greek language to estimate patient satisfaction with the overall care or the nursing care explicitly [14, 22, 23], to the best of our knowledge there are no tools that address the care provided to cancer patients explicitly. Therefore, the decision to validate the PSS questionnaire was merely drawn on the fact that there is always room for new scales in Greek which can capture an aspect that previously was left unexplored or understudied. This perspective on the necessity of satisfaction scales in the enhancement of patients’ outcomes evaluation has been stressed by Apolone and Mosconi  and this study comes as a response to the need to adapt, test and validate questionnaires for patient satisfaction in Greek.
This paper describes the translation and psychometric validation of the PSS in hospitalized Greek cancer patients. The PSS has satisfied all of Rubin’s criteria , for comprehensive content; multi-item subscales; a uniform response scale; at least four response options for each item; interpretability using norms or other criteria and its validity assessment is important to accurately measure quality of care; it is a very popular tool for eliciting satisfaction in different clinical settings and has previously been validated to the Cypriot population showing that it is a practical tool to measure patient satisfaction in oncology settings . This study will allow cross-cultural adaptation and validation of the Greek-language version of the questionnaire in the Greek population with its distinctive cultural influences.
This study was guided by the following research questions:
What are the psychometric properties of the Greek Version of the Risser Patient Satisfaction Scale?
Does the Greek Version of the PSS offers substantial reliability?