Table 4 Multiple linear regression testing mediator effects for fear-avoidance beliefs (M) between psychosocial variables (X) and expected time for RTW (Y) 95 % CI = 95 % confidence interval

  High strain

1.2 ((−0.1)–2.4)

0.07

1.2 ((−0.2)–2.7)

0.1

  Active

−0.2 ((−1.5)–1.5)

0.9

−0.3 ((−1.9)–1.3)

0.7

  Passive

0.8 ((−0.3)–2.0)

0.1

0.7 ((−0.5)–2.0)

0.2

  Low strain (REF)

1.0

1.0

  Fear-avoidance

1.2 (0.7–1.6)

<.0001

1.2 (0.7–1.7)

<.0001

  High strain

1.1 ((−0.1)–2.4)

0.07

1.3 ((−0.1)–2.7)

0.08

  Active

0.2 ((−1.3)–1.6)

0.8

0.03 ((−1.5)–1.6)

0.9

  Passive

0.7 ((−0.4)–1.8)

0.2

0.7 ((−0.5)–1.9)

0.2

  Low strain (REF)

1.0

1.0

  Fear-avoidance

0.8 (0.4–1.3)

0.0003

0.8 (0.3–1.3)

0.002

 Model 1

0.3 ((−0.3)–0.8)

0.3

0.2 ((−0.4)–0.8)

0.6

1.2 (0.8–1.7)

<.0001

1.3 (0.8–1.8)

<.0001

 Model 2

0.3 ((−0.3)–0.8)

0.3

0.2 ((−0.4)–0.8)

0.5

0.9 (0.5–1.4)

<.0001

0.9 (0.4–1.5)

0.0004