Table 2. Utilization and Share of Total Health Care Spending Attributed to Primary Care.
| Individuals by Age Group, y | Share of Total Health Care Spending in 2017, US $ | Individuals With Primary Care Clinician Utilization | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Broad Definition | Narrow Definition | |||||||||||
| 2013, % | 2017, % | Difference, % (95% CI) | P Value | 2013, % | 2017, % | Difference, % (95% CI) | P Value | 2013, % | 2017, % | Difference, % (95% CI) | P Value | |
| Total | 8.97 | 8.04 | –0.93 (–0.95 to –0.91) | <.001 | 4.60 | 4.35 | –0.25 (–0.27 to –0.23) | <.001 | 78.35 | 79.65 | 1.30 (1.27-1.34) | <.001 |
| 0-17 (Children) | 20.33 | 19.54 | –0.79 (–0.82 to –0.76) | <.001 | 13.68 | 12.51 | –1.17 (–1.20 to –1.14) | <.001 | 89.99 | 90.71 | 0.72 (0.70-0.74) | <.001 |
| 18-24 | 8.69 | 8.48 | –0.21 (–0.23 to –0.19) | <.001 | 4.55 | 4.52 | –0.03 (–0.05 to –0.01) | .03 | 66.77 | 69.23 | 2.46 (2.42-2.50) | <.001 |
| 25-34 | 7.66 | 7.07 | –0.59 (–0.61 to –0.19) | <.001 | 3.77 | 3.74 | –0.03 (–0.05 to –0.01) | .001 | 65.82 | 67.27 | 1.45 (1.41-1.49) | <.001 |
| 35-44 | 7.82 | 7.02 | –0.80 (–0.82 to –0.78) | <.001 | 3.94 | 3.82 | –0.12 (–0.14 to –0.10) | <.001 | 72.89 | 73.95 | 1.06 (1.02-1.10) | <.001 |
| 45-54 | 7.47 | 6.61 | –0.86 (–0.88 to –0.84) | <.001 | 3.43 | 3.40 | –0.03 (–0.04 to –0.02) | <.001 | 77.48 | 79.11 | 1.63 (1.60-1.66) | <.001 |
| 55-64 | 7.25 | 6.33 | –0.92 (–0.94 to –0.90) | <.001 | 3.00 | 3.01 | 0.01 (0.00 to 0.02) | .26 | 82.59 | 84.23 | 1.64 (1.61-1.67) | <.001 |