Using a list of all EAs within each state obtained from the Nigerian National Population Commission, 60 clusters per state were selected in systematic (equal interval) fashion with a random start.
Problems with multiplicity in systematic reviews have major implications for the interpretation of the confidence intervals and the P-values [ 29, 30] – and problems with multiplicity are often not accounted for in systematic reviews [ 28, 29, 31].
In systematic sampling, the first patient was randomly selected and the others were drawn from the clinic database according to a sample interval defined as N/n until achievement of the desired sample size.
In fractional interval systematic sample selection, first a random starting point between 1 and total number of branches was randomly chosen, the interval then is added obtaining exactly n (sample size) branches.
This rate exceeds the weighted mean of 9.5% identified in our systematic review (95% confidence interval (CI) 8.1 to 11.0), but this finding is not surprising, because most of the studies in our systematic review were retrospective case series at risk for selection bias or under reporting, owing to outcomes assessment bias.
It consisted in a systematic modelling of the time intervals between all possible pairs of peaks over the whole 3D experimental domain.
Three sets of switches from S− to S+ could be constructed by manipulating pulse amplitude and interpulse interval in a systematic way, each keeping one of the vibrotactile stimulus parameters constant while changing the other 2 (Fig. 1 B).
Financial-incentive programmes recruit substantial proportions of participants to underserved areas (the random-effects estimate of the pooled recruitment proportion across the studies in our systematic review was 71%95%5% confidence interval 60%to8080%)) [ 22].
The present effects were not short term: in the intervals shorter than 80 ms, we did not find a systematic effect of their duration on AR.
In the proposed method, the systematic ΔF analysis allows to take into account all available information about the operation of observatory instruments in the intervals between the moments of absolute observations.
