Table 2. Mean absolute errors (MAEs) for models trained and applied on different age ranges.

MAE by Age Bin
Age Group Tested
Model Trained On	[1-18) Years	[18-45) Years	[45-65) Years	65+ Years
Top-5[1,18)	1.35	7.17	5.11	4.88
Top-5[18,45)	1.60	6.41	5.12	5.26
Top-5[45, 65)	2.21	7.18	3.28	NA
Top-565+	1.94	7.02	4.96	4.63
Top-10[1,18)	1.16	6.36	4.79	4.61
Top-10[18,45)	1.33	5.51	3.19	5.00
Top-10[45, 65)	2.12	6.80	2.91	NA
Top-1065+	1.53	6.57	4.79	4.49

Models containing only the Top-5 and Top-10 variables were trained in one age group and tested on all age groups. MAEs are from testing on the 20% held-out dataset in each case.