The average variation per year in waist circumference and weight was defined as the difference between the visit when diabetes was screened and the baseline visit divided by the number of years of follow-up.
Approximate age in years at first administrative claim for comorbidities (non-NF1 neurological conditions, diabetes, and UTIs) was determined by taking the difference between the visit year for the first claim for the comorbidity from 2006-2010 and the subject's birth year.
In the reference group, in which all subjects had fasted for at least 7 hours at both visits (n = 552), the difference between the two visits was less than 2%, Additional file 2. The mean (25th, 75th percentiles) total intraindividual biological variation (CVtb) of serum Tg of the reference group (n = 552) and the whole group (n = 4282) were 17.1% (6.5, 23.9) and 21.9% (8.3, 31.5), respectively.
The difference between that visit and the friendly welcome that a high-level Japanese delegation received just two months later in China, Japan's historic rival, could not have been more stark.
However, consideration of the potential impact of SES differences between the visit types was difficult because the amount of SES information available was limited and the differences between visit types in the proportion of patients from poverty areas were less pronounced than age differences.
However, there was no difference between the doctor visit group and the no visit group in the rate of consultation with a doctor concerning CAM use.
However Holm,1990 found no significant difference between the education visit and the mail-out arms of their intervention [ 32].
In his study respondents to mail surveys report higher figures on use of health care but this was not shown in our study as there were hardly any difference between the overall visiting rates to a physician.
The number of weekly influenza-attributed ED visits was calculated as the difference between model-predicted visits and the model-predicted visits under the hypothetical absence of influenza (baseline).
There was no difference between the follow-up visits before and after diagnosis.
The main analysis compared outcome measures for (1) the within-group difference between the first two visits for the IT (t1 t2) and DT groups (t0 t1) separately, and (2) the between-group difference for the first two visits (see Fig. 1).
