aFive studies (ABCFS, MARIE, MEC, MTLGEBCS and SASBAC) that selected all cases on the basis of age at diagnosis (Table S3 in Additional file 1) were excluded from this stratified analysis; two small studies (CTS and NBCS) that had no heterozygote or rare homozygote cases in one of the age stratum were also excluded.
Adolescents living in one of the four meshblock strata will be invited to participate in the study.
Kitahata et al. [ 16] identified treatment-naive patients with CD4 counts in one of two strata: 350 to 500 cells/μL and more than 500 cells/μL.
The effect on the estimated differences would be expected to be small, since no differences in mortality were found between any one of the strata, either in the Charlson or RMI Indexes (Table 4).
With the first two screening questions, they were placed in one of four equal strata according to khat consumption (active consumers vs. long-term khat abstainers) and gender.
Patients were placed in one of four prespecified age strata: 5 10, 11 21, 22 35 and >35 years of age.
All subjects lived in one of two geographic sampling strata: either a poor, inner-city area (St . Louis, Missouri, United States) or more heterogeneous suburbs just northwest of the City of St . Louis
But what strikes is the utter singularity of this wild and barbarous figure, a hybrid of beast, man and lizard, hair dragging the ground as he crawls along on his hands and knees in one of Blake's fantastical landscapes, somewhere between geological strata and the bottom of the ocean all at once.
Thirteen patients and six health professionals were invited to participate in the investigation after responding to the study advertisement (and being deemed appropriate in meeting one of the required purposive sampling strata).
*Not done for allocation concealment, blinding, trial site, maternal serum retinol and cumulative vitamin A dose received by neonate as all trials were categorised in only one of two strata.
