This literature review identified eight questionnaires which intended to assess spiritual needs of patients. A distinctive feature of this study was collecting the detailed characteristics of the instruments with their strong and weak points. Therefore, those interested in spiritual needs can choose the appropriate instrument regarding the constructs assessed by these instruments. However, the followings are some pitfalls seem to exist in this field of research:
A, The similarity of all the aforementioned questionnaires assessed spiritual needs of patients in critical conditions, mostly patients with cancer, and designed questionnaires to answer these specific patients’ needs. On the other hand, cancer can significantly increase and change patients’ spiritual needs, because patients rely on spirituality as a strong method to deal with cancer (
10,
28,
29). This approach, however, clinically limits the concept to a particular group. Further studies are recommended to design appropriate instruments for other patient groups and the healthy population; B, for assessing spiritual needs, one should understand the voice that lies deep within the respondent that may reveal something of the respondent’s inner self. Furthermore, these needs are related to each other and they are not independent. Therefore, despite the advantages of questionnaires in research, clinicians should be cautious of this point and avoid applying instruments stereotypically (
30); C, with the exception of the questionnaires mentioned in this paper, there were many qualitative studies to evaluate spiritual needs that considered other variables. These variables sometimes had an important role, but were not used in scales. Some examples include transcendental needs, mystical needs (including desire and mystical consciousness), which involve abstract aspects of spiritual needs (
30), and needs such as life beyond the individual, need for continuity and after life, need for truth, and need for freedom and to be free (
18). These points highlight the need to study and develop new questionnaires that cover more dimensions of spiritual needs; D, In most of these questionnaires, normalization information was incomplete. In some, the sample volume was not only low, but often used in limited studies, and in most of them, the theoretical bases of the questionnaire design were not mentioned. Therefore, using these questionnaires in clinical daily work should be performed with care until further research is conducted; E, Some concepts of these questionnaires are culture-dependent. For example, in western cultures, listening to music is a spiritual need, while in Iran listening to the Quran is more significant. Furthermore, depending on the culture in which the questionnaire is used, the priority of needs will change. In the Chinese version of SNAP, for example, the first priority is the need of actively giving (not inner peace that is seen in the German normalization) (
26). In Iran, on the other hand, the significant need is going to the prayer hall and participating in mass prayer (
2,
30-
32). In Korea, in contrast with western cultures, some patients are not comfortable in talking about death and unfinished works at the end of life (
15). This is important from two perspectives: First, one construct can be measured by different factors in different cultures. Therefore, translating these questionnaires into different cultures requires some adjustment of certain items. Second, because of cultural differences and the relationship between spiritual needs and culture, it can be recommended to design culture-specific questionnaires; F, historically, a criticism in questionnaire design is the reductionist approach. It seems that the concept of spirituality varies from religious to secular, and this topic is seen in spiritual needs surveys. For example, in the aforementioned questionnaires, general concepts such as the need of meaning discovery in illness are weak, and strong concepts such as life beyond the individual were measured by variables such as talking with others. The concept of life beyond the individual is more extensive than interaction with others. For example, in top sense, the beauty can achieve (that is kind of intuitive beauty) (
33), while the concept of life beyond the individual was simply about talking with others. This point should be considered important in culture-specific questionnaire design, especially in Eastern cultures where religious concepts have a strong link to spiritual concepts (
18,
34,
35).
There were some limitations for the present study. First, there were not enough references such as congress papers, abstracts, theses, etc. The reason was the unavailability of details because of lack of publication in research sites. Second, the concept of spiritual needs is an extensive one for the introduction of which several words can be used and may be overlooked in the keywords. Furthermore, there were many questionnaires that assess different dimensions of spirituality including spiritual needs. We deleted them from our study because our focus was on the questionnaires that assessed spiritual needs specifically.
In conclusion, spiritual need is a complicated, multi-dimensional phenomenon. Although most of the studies showed that the need of relationship was the center of spiritual needs, the complexity of these needs cannot be summarized in this concept (
25,
36). Therefore, the assessment of questionnaires should be conducted with a great deal of care and consideration. This is an aspect that has been ignored in most questionnaires and has led to the lack of harmony in terms of content and assessment.