Table 3

Mean intervals and WAD for movements between health states


Mean interval between health states


Health states
SG§ [95% CI]
PTO-Down ° [95% CI]
PTO-Up$ [95% CI]
WAD* [95% CI]
A–B
0.0875 [0.0637–0.1113]
0.0480 [0.0223–0.0736]
0.0502 [0.0304–0.0700]
0.6443 [0.5811–0.7075]
A–C
0.2056 [0.1836–0.2276]
0.0778 [0.0488–0.1069]
0.1032 [0.0716–0.1348]
0.5248 [0.4616–0.5873]
A–D
0.4015 [0.3738–0.4292]
0.1484 [0.1111–0.1857]
0.1857 [0.1389–0.2325]
0.4748 [0.4066–0.5431]
A–E
0.5658 [0.5354–0.5961]
0.2977 [0.2487–0.3467]
0.3694 [0.3112–0.4277]
0.4919 [0.3951–0.5888]
A–F
1 --
1 --
1 --
0.5167 [0.3542–0.6791]

N = 127 Results of paired t-tests: §Significant different to PTO-Up at 1% or better; ° Significant different to SG at 1% or better; $Significant different to PTO-Down at 1% or better for A – E, at 10% for A – D and A – C; *WAD values were calculated as described in eq. 4.1 (section 5) of the study design

Schwappach BMC Medical Informatics and Decision Making 2002 2:3   doi:10.1186/1472-6947-2-3