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. 2019 Jun 27;6:101. doi: 10.1038/s41597-019-0084-8

Table 1.

Development potential index (DPI) classes.

DPI Class Standard z-score range* Estimated percentile range*
Very High >1.282 >90th percentile
High 0.675–1.282 75th percentile–90th percentile
Medium-high 0.000–0.675 50th percentile–75th percentile
Medium-low −0.675–0.000 25th percentile–50th percentile
Low −1.282–−0.675 10th percentile–25th percentile
Very Low <=−1.282 <=10th percentile

Standard z-score ranges used to define Development Potential Index (DPI) classes and estimated percentile data ranges based on normally distributed values.

*Highest value in range included in class (e.g. z-score 1.282 is assigned to High DPI class).