Table 3.

Demographic information for the subjects in each of the entire, training, validation, and test sets from the MrOS dataset. By listing in the “Sampled test set (m2ABQ)” column, we also show the demographic information of the subjects in the sampled test set with 122 radiographs annotated by the m2ABQ criteria (see the “MrOS dataset” section of the “MATERIALS AND METHODS” section). The mean ± standard deviation of the ages was recorded at the baseline (Visit 1) and the follow-up (Visit 2) visits. If a subject reported multi-races, each race would be recorded.

	Training set	Validation set	Entire test set	Sampled test set (m2ABQ)	Entire dataset
	Mean ± standard deviation
Age at Visit 1	73.7 ± 5.9	74.1 ± 6.2	73.5 ± 5.7	74.5 ± 5.8	73.7 ± 5.9
Age at Visit 2	77.8 ± 5.6	77.9 ± 5.6	77.5 ± 5.4	77.8 ± 5.3	77.7 ± 5.6
	Number (percentage) of subjects
Race/ethnicity
American Indian or Alaska Native	42 (0.8%)	7 (1.8%)	8 (1.2%)	0 (0.0%)	57 (0.9%)
Asian	159 (3.2%)	12 (3.1%)	25 (3.7%)	5 (4.8%)	196 (3.2%)
Black or African American	212 (4.2%)	21 (5.4%)	21 (3.1%)	4 (3.8)	254 (4.2%)
Hispanic or Latino	100 (2.0%)	11 (2.8%)	15 (2.2%)	0 (0.0%)	126 (2.1%)
Native Hawaiian or Other Pacific Islander	11 (0.2%)	3 (0.8%)	1 (0.1%)	1 (1.0%)	15 (0.2%)
White	4,492 (89.6%)	338 (86.1%)	611 (89.7%)	95 (90.4%)	5,441 (89.4%)