*2.1. Participants*

The sample was made up of 1352 nurses selected at random from several health centers, and therefore actively employed at the time data were collected. Subjects who did not complete the questionnaire or who gave random answers (detected by control questions) were eliminated from the study. The final sample consisted of a total of 1236 participants, of whom 69.3% (*n* = 857) were working under temporary contracts and the other 30.7% (*n* = 379) had permanent contracts.

The mean participant age was 31.50 years (*SD* = 6.18), in a range of 21 to 57 years. Of the whole sample, 84.5% (*n* = 1044) were women and 15.5% (*n* = 192) were men, with a mean age of 31.65 years (*SD* = 6.23) and 30.71 years (*SD* = 6.17), respectively. Their marital status was 55% (*n* = 680) single, 42.1% (*n* = 520) married or in a stable relationship, 2.8% (*n* = 34) divorced or separated, and 0.2% (*n* = 2) widowed. In addition, 68.9% (*n* = 852) of the participants had no children, 14.5% (*n* = 179) had 1 child, 13.2% (*n* = 163) had 2 children, and the remaining 3.3% (*n* = 41) had 3 or more.

Their distribution by area of work was 32% (*n* = 396) staff nurse and 21.9% (*n* = 271) on emergency teams, while 11.4% (*n* = 141) were working in the ICU, 10.7% (*n* = 132) in surgery, 2.3% (*n* = 28) in outpatient care, and 4% (*n* = 50) in the mental health unit. The remaining 17.6% (*n* = 218) were working in other areas.
