Optimal operation conditions for different mass spectrometers and modes of operation of a tandem instrument may differ significantly, producing the need to compromise in the performance of one mass spectrometer at the expense of another [14] [16].
As instrument type and calibration methods may differ among hospitals, it is important that each center conducts an in-house study.
Because the meaning of the construct the instrument is designed to measure may differ from one culture to other, it is of paramount importance to ensure cultural equivalence before using a translated version of the scale in the Hong Kong Chinese context.
Despite these results, the validity and reliability of an instrument, when applied to a population in a different cultural context, may differ from those of the original.
Documenting the instrument's performance characteristics in biospecimen donors, who may differ from potential donors, will allow the instrument to be used at multiple time-points throughout the research process.
Third, previous studies relied on other instruments to measure autonomy and sociotropy, which may differ from the DAS-A in terms of their contents (e.g., See Pincus and Gurtman 1995).
The microstructure dynamics, however, may differ considerably from one financial instrument to the next.
Our instrument was based on previous work and established guides but results may differ with other assessments tools.
Estimates of the prevalence of CD may differ across studies because of variations in diagnostic instrument, informant, time period for assessing psychiatric status, and source population.
Patient and proxy reports may differ because of the lack of parallel content in the instruments used [ 9].
