Fourth, for all five conditions, we used claims data for only one year prior to the REGARDS in-home visit to define pre-specified and data mining Medicare variables, instead of using all available claims.
We excluded such potential cases from our outcome definition to avoid potential bias in the rate ratio due either to exposure misclassification (had we defined such ambulatory cases on the second or third visit for diabetes) or immortal time bias (after multiple visits going back to the first visit to define the index date).
The use of the one-month lag between visits to define new cases in our study also ensured sufficient number of events to improve the study efficiency, and decrease the possibility of counting follow-up visits as new events.
Taking into account that such vaccination is not recommended below two months of age, we combined all the pediatric visits to define all the possible vaccination schedules with 1, 2 and 3 doses.
ALS milestones for investigation as potential staging criteria were selected on the basis of being easily clinically available by being routinely collected at any clinical visit, straightforward to define in terms of presence or absence of involvement, and useful for phenotypic classification (Wijesekera et al., 2009).
There is a possibility of random error in the PD20AMP values, and to reduce the impact of spurious results at randomization, we used the mean of the randomization and screening visits values to define the baseline PD20AMP, in accordance with our protocol.
Although carry-over effects from previous medications cannot be excluded because (i) the visits used to define persistence were close to each other in time and (ii) there was a linear decrease in incidence of TDD over the entire study period, the results from the sensitivity analyses suggest that carry-over effects did not play an important role.
Midstream voided urines were obtained from 1261 women during their asymptomatic enrollment clinic visits and used to define the three groups: no ASB (<103 cfu/ml), medium ASB (≥103 to <105 cfu/ml), or high ASB (≥105 cfu/ml).
We used the model to test competing hypotheses regarding delayed effects of fallback at dams and visits to tributaries, and to define and estimate migration summary measures.
However, this study included patient diagnoses or reasons for visits to village doctors to define appropriate, inappropriate, and harmful treatments.
But my taste buds kept wandering back to the ika somen and the uni that came to define our visit here — a trip that seemed to complete the journey my father unwittingly triggered decades ago when he first urged me to try sea urchin.
