Of the studies that did not find an association, two had weak study designs, including one small cross-sectional study.
Serum obestatin levels in the end stage kidney disease patients were significantly higher compared to that of controls in one small cross-sectional study [ 9].
DPP-IV activity was, in fact, found to be higher in diabetes in one small cross-sectional study (7), although this finding has not been a consistent one (8, 9), and larger studies with incident diabetes are lacking.
Finally, the cannabis withdrawal syndrome has not yet been studied in poly-substance using patients with the exception of one small cross-sectional study by Vorspan and colleagues that indicated that sleep disturbances, but not other cannabis withdrawal symptoms, were exacerbated in patients with co-morbid opioid dependence [ 26].
In one small-scale cross-sectional study, RA patients were found to have higher serum atrial natriuretic peptide levels than healthy, non-RA controls [ 99].
One small randomized cross-over study (n = 15) and one study comparing 33 patients on predilution CVVH to 15 historical postdilution controls found longer circuit survival with predilution [ 25, 26] at the cost of a diminished clearance [ 26].
Although the incidence of dementia was higher among Native Americans than among other racial/ethnic groups in the current study, one small Canadian cross-sectional study reported a similar prevalence of dementia among Native Americans living on two reservations in Manitoba relative to non-Hispanic whites living in Winnipeg (4).
To our knowledge, only one relatively small cross-sectional study has assessed the association between HRQoL-scales and aerobic fitness so far [ 12] and found a positive relationship between VO2peak and several scales, which did not persist after adjusting for age and gender [ 12].
If you're going to die, make it a big one.' Well, my Republican colleagues don't want to die on a small cross".
One small double-blind cross-over study examined whether SPG block reduces experimentally induced pain using submaximal effort tourniquet test, but the SPG block failed to make a difference in pain perception [37].
