The influence of pain catastrophizing, kinesiophobia and fear-avoidance attitudes towards
non-specific low-back pain has been scarcely studied in an occupational insurance provider
context. The objective of this work is to ascertain the relationship between these psychoso-
cial variables with work absence, its duration and the disability of subjects with work-related
low back pain. This is a descriptive observational methodological strategy. All patients with
work-related non-specific low back pain who attended to an occupational health hospital dur-
ing the study period were included consecutively. Clinical variables of kinesiophobia, pain cat-
astrophizing, fear-avoidance attitudes, disability and pain were collected; sociodemographic
variables of sex, age, type of work, educational level, occupational status and duration in days
of work absence were recorded. Kinesiophobia (b = 1.43, P = 0.011, r = 0.333), fear-avoid-
ance beliefs in its global dimension (b = 0.910, P = 0.014, r = 0.321), fear-avoidance beliefs in
its work dimension (b = 1.255, P = 0.016, r = 0.321) and pain catastrophizing (b = 0.997, P =
0.013, r = 0.340) show individual association with the duration of sickness absence. Kinesio-
phobia (b = 0.821, P = 0.011, r = 0.30) and fear-avoidance beliefs (b = 1.760, P = 0.016, r =
0.28) are associated with disability (Kinesiophobia, b = 0.880, P = 0.045, r = 0.26; Fear-avoid-
ance beliefs, b = 0.724, P = 0.010, r = 0.34). Kinesiophobia, fear-avoidance beliefs and pain
catastrophizing are related to an increase in the duration of work absence and disability in
patients with back pain in an occupational insurance provider context.