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Despite a large sample size, this study suffered important limitations, including a retrospective and single-center design, the use of an arbitrary cutoff point to define fresh and old blood, and the absence of adjustment for some important confounding factors[60].
No ingredients were significantly associated with illness in the absence of adjustment for possible confounders.
Of 101 menu items individually evaluated, no items were significantly associated with illness in the absence of adjustment for possible confounders.
Limitations of this study included the retrospective observational design, and the absence of adjustment for comorbidities.
Presence or absence of adjustment for smoking and socioeconomic status was not a source of heterogeneity in the primary studies.
Interestingly, the signal from this group of variants was practically undetectable in the absence of adjustment for rs7006527 (P = 0.020, OR = 0.94 for rs3133679 unadjusted).
Similar(41)
Therefore, the absence of adjustments in our study, when most studies adjusted by comorbidities and previous vaccination, could be a reason for the high effectiveness we observed.
To investigate the impact of the control for confounding factors on the study estimates, we grouped the studies according with the presence or absence of adjustments.
"Restoration of competitiveness and weighty fiscal consolidation in the absence of currency adjustment is difficult but doable," they said, "as long as politicians and the general public are willing to accept some upfront pain in return to longer-term gains".
However, while not explicitly stated, the essential aim of such interventions has been to provide private banks with the funds necessary to stabilise sovereign debt markets in the Eurozone, in the absence of alternative adjustment mechanisms.
(The numbers for the total civilian population used for extrapolation in the survey sample haven't been adjusted for the call-up of reservists for the war in Iraq; but the absence of this adjustment probably accounts for only half of the increase).
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CEO of Professional Science Editing for Scientists @ prosciediting.com