The investor, who planned to profit by developing and exporting agricultural commodities, boasted about how the region's instability was a principal variable in his financial model: "This is Africa," he told reporter McKenzie Funk, who shadowed him for a riveting piece in Rolling Stone (PDF).
As reflected in Table 2, given that physical health exhibits the highest correlation with ADLs, this variable was considered the principal variable in the logistic regression analysis, while mental health, age, sex, marital status, education and personal finances were treated as modifying variables.
Certain studies have also suggested that the use of PSI as the principal variable in making the admissions decision could compromise patient care especially in the economically disadvantaged.[ 25] This study is limited by its retrospective nature and relatively small sample size.
Also, the authors should consider that the poor performance is likely because of the high degree of interference between the many repeated left- and right-turn trials, consistent with the favored interpretation that stimulation at the right time may reduce interference of competing memories, which could be viewed as the principal variable in controlling performance.
We ran the Principal Variables Analysis in R — package 'subselect' (Mccabe, 1984; Cadima and Jolliffe, 2001; Cadima et al., 2004) — using the correlation matrix of original non-imputed data, which was computed on all available pairwise observations for each pair of variables.
Recommendations by principal variables are summarised in Figure 2 for NAID.
SF-36 has two components, viz., physical and mental components; both were considered principal variables and were given in median and standard error.
Above this radius, thermal runaway, flow channelling and steep radial gradients in all principal variables may occur.
The principal variables that must be controlled in crystallization are the solution supersaturation, the crystal surface area available for growth, and the nucleation rate.
