Objective:To survey the normal values of pelvic inclination of external pelvimetry and to provide evidence so as to estimate dystocia risk index for antenatal care.
测量骨盆倾斜度外测量正常值,为产前检查估计难产风险指数提供依据。
Normal values
英语例句库
原声例句
球球的电影
I find her contempt for normal values pretentious.
她习惯于对那些平常的道德观不屑一顾。
英语百科
Reference range
（重定向自Normal values）
![When assuming a normal distribution, the reference range is obtained by measuring the values in a reference group and taking two standard deviations either side of the mean. This encompasses ~95 % of the total population.](/Images/godic/202501/30/Standard_deviation_diagram.svg2817.png")
![A log-log graph showing the standard deviation of a standard reference range limit (SDSRRL) on the y-axis, as a function of the sample size on the x-axis.](/Images/godic/202501/30/Standard_deviation_of_standard_reference_range_limit2818.png")
![Some functions of log normal distribution (here shown with the measurements non-logarithmized), with the same means - μ (as calculated after logarithmizing) but different standard deviations - σ (after logarithmizing).](/Images/godic/202501/30/PDF-log_normal_distributions.svg2818.png")
![Coefficient of variation versus deviation in reference ranges established by assuming arithmetic normal distribution when there is actually a log-normal distribution.](/Images/godic/202501/30/Diagram_of_coefficient_of_variation_versus_deviation_in_reference_ranges_erroneously_not_established_by_log-normal_distribution2818.png")
In health-related fields, a reference range or reference interval is the range of values for a physiologic measurement in healthy persons (for example, the amount of creatinine in the blood, or the partial pressure of oxygen). It is a basis for comparison (a frame of reference) for a physician or other health professional to interpret a set of test results for a particular patient. Some important reference ranges in medicine are reference ranges for blood tests and reference ranges for urine tests.
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