Table 5: Four independent linear regression analyses with SOC total and subdimension scores as dependent variables in patients with Crohn’s disease ( ).

Independent variablesSOC total scoreComprehensibility Manageability Meaningfulness
value value value value

Step  1.
 Gender (female = 0) 0.050.425 0.060.336 0.140.023−0.090.103
 Age in years0.110.070 0.110.096 0.060.3590.060.333
 Education level (≤12 years = 0)0.090.1440.040.590 0.130.0450.070.251
 Work status (not working = 0)−0.030.666 0.010.859
 Marital status (not married/cohabitating = 0)0.100.0900.090.174 0.140.023
 Current smoker (no = 0)−0.060.305−0.030.643−0.110.063
Explained variance )9.1%4.7%11.3%8.7%
Step  2.
 HBAI 0.000.990−0.010.866−0.010.8560.020.694
 Disease duration in years 0.080.186
 Adverse drug reaction (no = 0)−0.080.157−0.110.075−0.100.104
change3.1%2.3%2.8%2.3%
Step  3.
 FSS-5−0.31<0.001−0.170.012−0.26<0.001−0.38<0.001
change11.2%4.8%7.4%15.3%
Step  4.
 GSE0.42<0.0010.39<0.0010.31<0.0010.36<0.001
change15.9%14.2%8.7%11.9%

Total 39.3%26.0%30.3%38.2%

Abbreviations: : standardized beta coefficient; HBAI: Harvey-Bradshaw activity index; FSS-5: Five-Item Fatigue Severity Scale; GSE: General Self-Efficacy Scale.
In addition to gender and age, variables that had a Pearson correlation coefficient with in bivariate analyses were included in final regression models.