Background/Objective: The most common used instrument to measure optimism, both in psychological and medical research, is the Life Orientation Test- Revised (LOT-R). A multi-countries study using the future item from the LOT-R, found that level of optimism varied between countries. The provision of population-based norms is necessary, since norms enable the application of the LOT-R in individual diagnosis to compare individuals or special patient groups’ scores with reference data. Method: A representative population based survey was conducted in 2014-2015. Norwegian aged 18–94 years (N = 1,792) completed questionnaires assessing sociodemographic, optimism and health and quality of life. Results: The mean age was 53.2 (SD = 16.6) and 53% were women. Mean LOT-R score was 17.2 (SD 3.0). There were marginal age and no gender differences. Although optimism was associated with sociodemographic variables, these were considered negligible due to small effect size. Norm data are given for the entire population. Optimism was associated with better health and quality of life. Conclusions: This study provides age and gender specific norm values from a representative sample of the Norwegian population. The normative data may be used in comparisons of optimism between individuals or between different samples of patients or sub-groups of people.

Purpose Breast cancer survivors may experience pain, fatigue, or psychological distress as a result of the treatment. These symptoms may co-occur and form a cluster. However little is known about symptom clusters (SCs) in long-term breast cancer survivors. This study aimed to identify subgroups of breast cancer survivors with the SC of pain, fatigue, and psychological distress, and to examine sociodemographic and clinical characteristics associated with this SC. Methods Data were obtained from a nationwide survey of breast cancer survivors (N = 834). Exhaustive enumeration of possible combination of the three binary variables (pain, fatigue, psychological distress) was conducted. They were identified using the recommended threshold for the Hospital Anxiety and Depression Scale, the Fatigue Questionnaire, and a score of one or more on a numeric rating scale for pain. The SC was defined to include all the three variables, all other combinations were defined as no SC. Logistic regression analyses were conducted to examine the association between sociodemographic and clinical variables and the SC. Results Of the 834 survivors, 13% had the SC. Younger age (OR 2.3, 95% CI 1.3-4.1, p = 0.003), lymphedema (OR 1.9, 95% CI 1.1-3.2, p = 0.02), working part-time (OR 2.9, 95% CI 1.6-5.3, p < 0.001), or being disabled (OR 4.1, 95% CI 2.2-7.8, p < 0.001) were all associated with the SC. Conclusion Thirteen percent of the survivors experienced the SC. It appears that premenstrual women are at greater risk, than postmenopausal women. Having this SC might have an impact on the survivors' ability to work.

Male gender and being employed were related to higher GSE among persons in the general population in Norway, and these associations were stronger among persons of younger age. The findings are considered fairly representative for the Norwegian population.