Each subject could contribute only once to each of the incidence rates, regardless of the number of occurrences.
Our score also avoids overcounting repetitive sequences by allowing each k-mer to contribute only once to the similarity score and permits mismatches.
For example, if a household stored multiple insecticides that contained permethrin, it would contribute only once toward the prevalence of insecticides or permethrins.
When looking at the data by patient group, data were aggregated so that an individual could contribute only once to each specific problem category, although they may contribute to a number of different problem categories.
Some replies were combined, for example, 'MRSA' (Methicillin resistant Staphylococcus aureus) were combined with 'multiresistant bacteria', thus anyone replying both 'MRSA' and 'multiresistant bacteria' contributed only once to 'multiresistant bacteria or MRSA'.
To investigate recurrence of cerebral palsy among first degree relatives, we linked singleton births with the same mothers and fathers, thus identifying 1 228 427 unique full sibling singleton pairs, with each pair contributing only once.
As trial participants could contribute only once to a given meta-analysis with regard to the comparison of active treatment versus placebo and a given meta-regression analysis, trials with randomisation to three treatment arms 21353838 contributed results from only two of the possible three treatment comparisons, with the control arm participants divided randomly between the two comparisons.
To investigate recurrence among second degree relatives, we identified 152 496 half sibling singleton pairs within the cohort who had the same mother but different fathers and 202 441 pairs with the same father but different mothers, with each pair contributing only once.
