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References in periodicals archive ?
In addition, serum S100B protein levels significantly increased in high tidal volume group compared to baseline level, indicating neuronal damage.
Little growth is observed in the medium and small volume groups from 2010 to 2012, while the large volume group continued to grow at a steady 6% per-year pace.
When compared to normal amniotic fluid volume group women with oligohydramnios had significantly low birth weight neonates which were born at comparatively earlier gestation (but all were > 37 weeks of gestation).
The cross tabulation of age group and prostate volume group is given in table 4.
Second, the enrolled patients were randomly allocated into minimum effective cuff inflating volume group (MC) and routine care (RC) group in the study 2.
The patients treated at hospitals that performed fewer than 200 PCI procedures annually may have a similar mortality rates in any other PCI volume group. Several concerns have been raised about attempts to assess the previous results be generalized to other countries outside the USA.
The hospital mortality was 46% in the traditional tidal volume group and 50% in the low tidal volume group.
While most previous studies have analyzed volume as either a continuous variable or a categorical variable using tertiles/quartiles, Bianchi and colleagues dichotomize annual hospital caseload as greater than 15 or less than 15 cystectomies per year.[sup.10] The cut-point is very high relative to other studies where "high volume" hospitals are usually defined as those that perform >5 to 10 cystectomies per year.[sup.4]-[sup.8] In dichotomizing this outcome and using such a high threshold, Bianchi and colleagues are left with only 12% (n = 1515) of their study population in the high volume group and all of these cases had surgery at academic hospitals.
This produced five statistical tests: Volume Effect--overall one volume group differs from the others pooling across time and folding; Folding Effect--overall folded and unfolded groups differ pooling across time and volumes; Time Effect--overall values change over time pooling across volumes and folding; Interaction (time by volume)--the change over time differs in the volume groups pooling over folding; and Interaction (time by folding)--the change over time differs between folded and unfolded groups pooling over volume.
In some (but not all) cases they are ordered appropriately but analyses suffer because the volume thirds do not well subdivide the groups (e.g., even at 5-6 drinks there are only 26 cases in the low volume group of intermittent heavy drinkers).
The exercise group was divided into a low (L-EX; <2630 m per night; n = 5), a medium (M-EX; 3000-7460 m per night; n = 10) and a high (H-EX; >8310 m per night; n = 5) exercise volume group. For additional information see Matsakas et al.