Two specific items were added: one related to misconduct (item 1b), which includes suspicion of forgery, and one related to sample-size calculations (item 4b).
Second, to investigate the psychometric properties - that is whether the instruments were reliable and valid - we used five standard techniques: exploratory factor analysis, reliability coefficient calculations, item-total correlation, inter-scale correlation and scale versus global rating analysis [16], [23], [24].
For SF-36 v.2 calculation, items were transformed into domains.
Second, two panelists believed that the calculation items were too difficult or not pertinent to physical therapy practice and research literature.
To address this concern, the value of calculation items was reduced from 32 to 28 points and one calculation (Negative Predictive Value) was replaced with a question requiring interpretation of an alpha and p-value.
Table 1 Comparison between Viraph's and depthMapX's calculation Item depthMapX Viraph (A) Viraph (C) Grid resolution (k) 2150 2099 2099 Unit size (AutoCAD units) 40 40.7 40.7 Average unit point diff.
The outcomes of main interest are designated as primary outcomes, which usually appear in the objectives (Item 7) and sample size calculation (Item 14).
And on other, longer-term, calculations.Related items Katrina's aftermath: When government failsSep 8th 2005 Hurricane Katrina: The shaming of AmericaSep 8th 2005 Katrina and oil prices: No safety netSep 8th 2005New Orleans was already losing people before Katrina; its population peaked, at almost 630,000, in 1960.
For further calculations, the items about psychosocial factors taken from the COPSOQ were transformed to metric scales (0 to 100) according to the instructions of the author [ 35].
