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The statistical processing was based on the principles used in NORIP. http://www.selleck.cn/products/bgj398-nvp-bgj398.html As most analytical parameters do not have a Gaussian distribution, calculations were made to establish nonparametric 2.5 and 97.5 percentiles. Dixon's test was performed to detect outliers [41]. The NORIP project used ��qualified guessing�� [2]. The adoption of this approach enabled us to make a subjective judgement of changes by age estimated by ��qualified guessing�� based on graphical visualisation of the data for the individual analytes, as well as comparing with existing data from Soldin's Pediatric Reference Intervals [16]. Age and gender partitioning of reference values were evaluated using the theory outlined by Lahti et?al. [42]. The criteria for not partitioning are that >0.9% or http://www.selleckchem.com/products/gsk1120212-jtp-74057.html most notably for children under the age of 1?year. It is pertinent to note that the first reports from the Canadian CALIPER initiative that used surplus material from patients attending outpatient clinics worked with fixed 5-year intervals for age partitioning [24, 26]. However, as in the present study, the latter part of the CALIPER project, which used blood collected from healthy nonhospitalised children, used visual inspection of distributions and scatter plots for overall trends in the data to identify potential age and sex partitioning [32]. The data generated in the Falun project are primarily applicable when the same analytical platform is used, but could be used by any laboratory, preferentially after validation for the local patient population. A correction for bias was applied for certain analytes using a defined reference serum, NFKK serum X, which should aid in the transferability of these reference intervals to other http://www.selleckchem.com/products/Bortezomib.html analytical platforms. The data from Falun are primarily applicable to Swedish or Caucasian children. The ultimate aim must be to have age- and gender-specific reference intervals for different ethnic groups. At present, very few such data are available although the CALIPER initiative has expressed such ambitions, and have published information on the ethnic distribution of their sample population and some preliminary data on ethnic differences for chemistry analytes [32, 43]. Puberty introduces a particular problem in paediatric reference studies.