Table 2

Predictors of Crohn's disease and combined psychosomatic outcome measure in 87 CD patients within two years

a) Univariate correlation

outcome of Crohn's disease (worse)

predictors (t₀)

health care utilization

HRQL

clinical course

sum score

CDAI

_•145

_•040

_•470***

_•324*

steroid intake

_•291*

_•025

_•352**

_•306*

disease duration

_•129

_•226*

_•01

_•059

sick leave at randomization

_•288*

_•021

_•315*

_•354**

depression (BDI)

.587***

_•306*

_•384**

_•248

anxiety (STAI)

_•101

_•655***

_•255

_•349*

behavior control (FK 2)

-_•162

-_•230*

-_•069

-_•043

b) Regression analysis

Health care utilization (HCU, high)

Model: r² = 0.15

F = 2.32

p = 0.09

β

T

p

1. Disease duration

0.92

2.1

0.04

Health-related quality of life (HRQL, low)

Model: r² = 0.51

F = 15.5

p = 0.00001

β

T

p

1. Anxiety (STAI)

-0.45

-3.9

0.0003

2. Behavior control (FK 2)

0.22

2.0

0.05

Clinical course of disease (CCD, worse)

Model: r² = 0.28

F = 6.16

p = 0.006

β

T

p

1. CDAI (t₀)

-0.43

-2.9

0.007

HR sum score: (HCU, HRQL, CCD)

Model: r² = 0.22

F = 7.9

p = 0.0009

β

T

p

1. steroid intake

0.31

2.6

0.01

2. depression (BDI)

0.30

2.5

0.02

* p < 0.05 ** p < 0.01 *** p < 0.001

Deter et al. BioPsychoSocial Medicine 2008 2:18   doi:10.1186/1751-0759-2-18