Article Figures & Data
Figures
- FIGURE 1.
Box-plots of absolute uptake of DMSA by sex. The box represents Quartile 1, Median and Quartile 3 of the data points. Whiskers show min to max data points, out to 1.5 X Interquartile range. The mean is indicated by a point within the box.
- FIGURE 2.
Scatter-plot of age of child against DMSA absolute uptake.
- FIGURE 3.
Scatter-plot of DMSA injected (mg) against DMSA absolute uptake.
- FIGURE 4.
Residual plots for multiple regression analysis. The fit of the regression line is examined by plotting the differences between the observed and predicted values of y, the residuals. Outliers are points with unusually large residuals. The residuals above the regression line should ideally mirror those below.
- FIGURE 5.
Residual plots excluding the 4 outliers.
- FIGURE 6.
Plot of 95% confidence intervals for age of child against DMSA absolute uptake. Confidence intervals are used to estimate the mean of the future observations of the population.
- FIGURE 7.
Plot of 95% confidence intervals for DMSA injected against DMSA absolute uptake.
- FIGURE 8.
Plot of 95% prediction intervals for age of child against DMSA absolute uptake. Prediction intervals are used to estimate a single future observation within the population.
- FIGURE 9.
Plot of 95% prediction intervals for DMSA injected against DMSA absolute uptake.
- FIGURE 10.
Plot of DMSA absolute uptake against time between injection and scanning.
- FIGURE 11.
Plot of age against DMSA injected (mg).
- FIGURE 12.
Plot of example prediction intervals for age and DMSA uptake with a standard injection of 0.36mg DMSA (calculated using the regression equation).
Tables
Group Mean DMSA uptake (mg) Standard Deviation Number of kidneys Female 0.01561 0.00803 56 Male 0.01639 0.01023 32 Variables Plotted Correlation (Pearson’s) P-value Correlation grade DMSA uptake v Age 0.770 <0.0005 HIGH DMSA uptake v Time 0.223 0.036 POOR DMSA uptake v DMSA inj. 0.940 <0.0005 HIGH Age v Time 0.238 0.025 POOR Age v DMSA inj. 0.671 <0.0005 GOOD Time v DMSA inj 0.158 0.140 POOR Variables Plotted Excluding case 6R&L Correlation (Pearson’s) P-value Correlation grade DMSA uptake v Age 0.802 <0.0005 HIGH DMSA uptake v Time 0.217 0.045 POOR DMSA uptake v DMSA inj. 0.943 <0.0005 HIGH Age v Time 0.235 0.029 POOR Age v DMSA inj. 0.737 <0.0005 GOOD Time v DMSA inj 0.148 0.174 POOR
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