Dosage: Pedigree & Performance
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Dosage Statistics (1983-2007)

The following table provides basic Dosage data for open stakes winners between 1983 and 2007. The data are presented by racing categories of surface, distance, age, sex and class of race. Each category includes the number of races in the sample, the average distance of the races in the category, the average number of points in each of the five aptitude groups (B=Brilliant, I=Intermediate, C=Classic, S=Solid, P=Professional in order from left to right) that comprise the Dosage Profile (DP), the average Dosage Index (ADI), the average Center of Distribution (ACD), the composite Dosage Index (CDI) and the composite Center of Distribution (CCD). Composite Dosage figures are calculated in the usual way by using the average points in each aptitude group. The CDI and CCD reflect the population as a whole rather than the average of each of the individuals in the population.

CATEGORY RACES     AWD        DP       PTS     ADI     ACD     CDI     CCD
ALL 23706    8.10    7.59 - 4.49 - 9.72 - 1.45 - 0.84    24.10   3.28    0.71    2.37    0.69
DIRT 16397   7.76   7.87 - 4.64 - 9.16 - 1.25 - 0.72   23.64   3.59   0.77   2.61   0.75
TURF 7309   8.85   6.99 - 4.17 - 10.98 - 1.91 - 1.09   25.14   2.58   0.58   1.96   0.56
<8 7441   6.28   8.17 - 4.60 - 8.37 - 1.07 - 0.53   22.74   4.10   0.85   2.93   0.83
8 TO 10 14973   8.68   7.39 - 4.48 - 10.25 - 1.55 - 0.92   24.58   2.97   0.67   2.24   0.65
>10 1292   11.77   6.61 - 4.05 - 11.44 - 2.57 - 1.65   26.32   2.11   0.45   1.65   0.43
2YO 3107   7.21   7.76 - 4.43 - 8.91 - 1.15 - 0.60   22.84   3.71   0.79   2.68   0.77
3YO 6938   8.16   7.61 - 4.50 - 9.80 - 1.38 - 0.78   24.08   3.26   0.72   2.41   0.70
OLDER 13661   8.27   7.55 - 4.51 - 9.87 - 1.56 - 0.92   24.40   3.19   0.69   2.29   0.66
MALE 13765   8.21   7.58 - 4.55 - 9.78 - 1.44 - 0.86   24.22   3.28   0.71   2.37   0.68
FEMALE 9941   7.94   7.61 - 4.41 - 9.65 - 1.48 - 0.79   23.94   3.27   0.71   2.37   0.69
G1 2678   9.12   7.93 - 4.66 - 11.31 - 1.68 - 1.08   26.67   2.84   0.64   2.17   0.63
G2 3720   8.58   7.68 - 4.41 - 10.62 - 1.56 - 0.93   25.19   3.01   0.67   2.23   0.65
G3 5661   8.25   7.58 - 4.44 - 10.06 - 1.46 - 0.83   24.37   3.14   0.70   2.33   0.68
UNGRADED 11647   7.63   7.50 - 4.51 - 8.91 - 1.37 - 0.75   23.03   3.53   0.75   2.51   0.72
BY DISTANCE:                                              
  5.50F 454   5.50   7.78 - 4.37 - 8.28 - 1.18 - 0.51   22.12   4.18   0.82   2.79   0.80
  6.00F 3445   6.00   8.27 - 4.66 - 8.10 - 1.00 - 0.47   22.50   4.38   0.88   3.08   0.86
  6.50F 932   6.50   7.78 - 4.24 - 8.02 - 1.14 - 0.56   21.74   3.86   0.83   2.81   0.81
  7.00F 1885   7.00   8.49 - 4.89 - 9.05 - 1.14 - 0.63   24.20   3.83   0.83   2.84   0.80
  8.00F 2714   8.00   7.57 - 4.38 - 10.23 - 1.54 - 0.79   24.51   3.06   0.69   2.29   0.67
  8.32F 327   8.32   7.65 - 4.46 - 8.58 - 1.38 - 1.01   23.08   3.35   0.73   2.46   0.71
  8.50F 5458   8.50   7.39 - 4.48 - 9.93 - 1.46 - 0.85   24.11   3.08   0.69   2.31   0.67
  9.00F 4615   9.00   7.28 - 4.53 - 10.44 - 1.58 - 0.94   24.77   2.89   0.65   2.20   0.63
  9.50F 304   9.50   7.18 - 4.45 - 10.78 - 2.02 - 1.26   25.69   2.53   0.57   1.96   0.56
10.00F 992   10.00   7.39 - 4.54 - 11.51 - 1.85 - 1.39   26.68   2.53   0.57   1.97   0.55
11.00F 485   11.00   6.69 - 4.05 - 11.55 - 2.55 - 1.52   26.36   2.12   0.47   1.68   0.45
12.00F 633   12.00   6.48 - 4.01 - 11.45 - 2.63 - 1.68   26.25   2.03   0.43   1.62   0.42

The charts below show the relationship between average DI and average distance, and between average CD and average distance for the data points in the above table.  The red line is the result of a linear regression analysis.  The R-squared values, both at 0.94, represent an outstanding correlation of the data and confirm the linear relationship between Dosage figures and distance.

The next table displays the median Dosage figures (median Dosage Index (MDI); median Center of Distribution (MCD)) for the same racing categories shown above, followed by median DI vs distance and median CD vs distance charts.  The trends are similar to those for the average figures in the previous table.

CATEGORY RACES     M DIST              MDP              M PTS     MDI     MCD
ALL 23706   8.50   7 - 4 - 9 - 0 - 0   24   2.60   0.75
DIRT 16397 8.00 7 - 4 - 8 - 0 - 0 22 3.00 0.80
TURF 7309 8.50 6 - 4 - 10 - 1 - 0 24 2.11 0.60
<8F 7441   6.00   8 - 4 - 8 - 0 - 0   22   3.00   0.87
8-10F 14973   8.50   7 - 4 - 9 - 1 - 0   24   2.43   0.70
>10F 1292   12.00   6 - 3 - 11 - 2 - 0   26   1.80   0.50
2YO 3107 7.00 7 - 4 - 8 - 0 - 0 22 3.00 0.81
3YO 6938 8.50 7 - 4 - 9 - 0 - 0 24 2.64 0.75
OLDER 13661 8.50 7 - 4 - 9 - 1 - 0 24 2.53