Table 2

Comparison of psychological outcomes between invited and non-invited participants. All values are means (SD).


Invited (n = 77)*
Non-invited (n = 168)*
p-value from t-test

STAI anxiety (range 20–80)
37.6 (12.2)
34.1 (12.1)
0.015




Self-perceived health; range (1 to 5)**
2.97 (0.86)
2.95 (0.87)
0.82




Illness representation subscales; (range 1 to 5)



     - Acute/chronic illness
3.95 (0.48)
4.07 (0.46)
0.07
     - Cyclic illness
2.99 (0.42)
2.93 (0.46)
0.64
     - Consequences
3.25 (0.47)
3.40 (0.50)
0.08
     - Personal consequences
3.67 (0.44)
3.70 (0.45)
0.60
     - Treatment control
3.60 (0.41)
3.60 (0.43)
0.87
     - Emotional representations
2.58 (0.66)
2.63 (0.75)
0.74
     - Illness coherence
3.10 (0.83)
3.05 (0.86)
0.98

* Numbers may vary from those in Figure 1 due to non-response of questionnaires

* *scored 1 = poor 2 = fair 3 = good 4 = very good 5 = excellent

Park et al. BMC Public Health 2008 8:350   doi:10.1186/1471-2458-8-350