Wishes to hasten death (WTHDs) are common in patients with serious illness. The Schedule of Attitudes Toward Hastened Death (SAHD) is a validated 20-item instrument for measuring WTHD. Two short versions have also been developed based on statistical item selection. However, all existing versions show some limitations with potential for improvement. This study aims to develop and initially validate a theory-driven and statistically sound SAHD short version based on a large multinational sample to advance the WTHD assessment in different countries and with different legislations.

A 3-step procedure was carried out including (1) theory-driven item selection, (2) exploratory, and (3) confirmatory factor analysis. We used a data set collected between 1998 and 2020 across 3 different countries (Germany, Spain, USA). Participants were N = 1156 complete cases (n = 181 German, n = 101 Spanish and n = 874 US) of severely ill adult in- and outpatients. They had to be ≥18 years and give informed consent.

The exploratory factor analysis revealed that 10 of 11 items previously selected theory-driven loaded on either of 2 factors: (1) WTHD and (2) internal locus of control. These factors showed good to excellent reliability according to Cronbach’s α and McDonald’s Ω, as well as an excellent fit of our data as an overall model for the total sample.

The developed SAHD-10 represents a reliable and valid alternative to the SAHD and an efficient means to measure and further investigate a WTHD in cross-cultural clinical and research settings.

Reliable and validated instruments are needed in order to study the desire for hastened death (DHD). As there is no instrument in the German language to measure DHD, our aim was to validate a German version of the Schedule of Attitudes Toward Hastened Death (SAHD–D).

The SAHD was translated following guidelines promulgated by the European Organization for Research and Treatment of Cancer (EORTC). In eligible patients (clinical situation adequate, MMSE ≥21), the following instruments were employed: a symptom checklist (HOPE), the HADS–D (Hospital Anxiety and Depression Scale), the EORTC-QLQ-PAL15, and the SAHD–D, as well as an external estimation of DHD provided by the attending physician. A high level of DHD was defined as the mean plus one standard deviation (SD).

Of the 869 patients assessed, 92 were eligible for inclusion (66% females, mean age of 64.5 years). The SAHD–D total score ranged from 0 to 18, with a mean of 5 and a standard deviation (SD) of 3.7. A high level of DHD was found in 20% (n = 19). For discriminant validity, significant correlations were found between the SAHD–D and depression (rrho = 0.472), anxiety (rrho = 0.224), and clinical state (rrho = 0.178). For criterion validity, the external estimate of DHD showed a low significant correlation with patient score (rrho = 0.290). Factor analysis of the SAHD–D identified two factors.

Validation of the SAHD–D illustrated good discriminant validity, confirming that a desire to hasten death is a construct separate from depression, anxiety, or physical state. The unidimensionality of the SAHD could not be reproduced. Our findings support the multifactorial interdependencies on DHD and suggest that the SAHD–D should be refined by considering actual wishes, general attitudes, and options of patients.