highly significantp < 0.001
All variables remained highly significant ( p < 0.001) at Step 4, except for age (p < 0.05) and PQFR (p = 0.101) .
All variables remained highly significant ( p < 0.001) at Step 4, except for age (p < 0.05) and PQFR (p = 0.101) .