(1) Background and objectives: The purpose of this work is to determine the association of
fear-avoidance attitudes with sickness absence status, its duration and disability in a work accident
context. (2) Materials and Methods: This is a descriptive observational design, conducting the study in
two occupational insurance provider clinics with patients with nonspecific low back and neck pain
during the study period. Clinical variables were the Fear Avoidance Questionnaire, Roland Morris
Disability Questionnaire, Neck Disability Index, Numerical Pain Scale; sociodemographic variables
were sex, age, occupational, educational level, sickness absence status, and duration in days of absence
from work. Multiple logistic and linear regressions were used to explore the association between
variables. (3) Results: Fear-avoidance behavior is related to sickness absence status (OR = 1.048,
p = 0.007), and the physical activity dimension (OR = 1.098, p = 0.013) is more relevant than the work
dimension (OR = 1.056, p = 0.028). The duration of sickness absence is related to higher values on
the fear-avoidance behavior scale in its global dimension (b = 0.84, p = 0.003, r = 0.327), and the
results of the physical activity dimension (B = 1.37, p = 0.035, r = 0.236) were more relevant than
the work dimension (B = 1.21, p = 0.003, r = 0.324). Fear-avoidance behavior is related to disability
in both dimensions (B = 0.912, p < 0.001, r = 0.505). (4) Conclusions: Fear-avoidance behaviors may
influence the typification of sickness absence status, its duration both in its physical activity and work
dimension, and its disability reported with higher values than in other healthcare contexts.