Table 1 Characteristics of estimation and validation samples
| Â | Estimation (n = 476 558) 60% | Validation (n = 316 681) 40% | p-value | ||
|---|---|---|---|---|---|
Characteristics | (n) | (%) | (n) | (%) | Â |
Age | Â | Â | Â | Â | 0.641 |
   0-17 | 105 430 | 22.1% | 70 449 | 22.2% |  |
   18-44 | 193 270 | 40.6% | 128 267 | 40.5% |  |
   45-64 | 125 831 | 26.4% | 83 385 | 26.3% |  |
   > = 65 | 52 027 | 10.9% | 34 580 | 10.9% |  |
   Mean age (S. D.) | 37.3 | (21.0) | 37.3 | (21.0) |  |
Gender | Â | Â | Â | Â | 0.284 |
   Female | 241 477 | 50.7% | 160 854 | 50.8% |  |
Rx_MGs | Â | Â | Â | Â | 0.368 |
   0 | 53 395 | 11.2% | 35 099 | 11.1% |  |
   < = 3 | 63 060 | 13.2% | 41 706 | 13.2% |  |
   < = 6 | 108 881 | 22.8% | 72 648 | 22.9% |  |
   < = 9 | 113 026 | 23.7% | 75 358 | 23.8% |  |
   > = 10 | 138 196 | 29.0% | 91 870 | 29.0% |  |
   Mean number of Rx_MGs (S. D.) | 7.19 | (4.98) | 7.20 | (4.97) | 0.247 |
Mean of total cost (USDa) (S. D.) | Â | Â | Â | Â | Â |
   Y2006 | 598 | (2063.4) | 600 | (2410.4) | 0.626 |
   Y2007 | 668 | (2339.7) | 672 | (2934.7) | 0.575 |
Mean of pharmacy cost (USDa) (S. D.) | Â | Â | Â | Â | Â |
   Y2006 | 155 | (752.2) | 158 | (1497.9) | 0.298 |
   Y2007 | 169 | (808.5) | 174 | (1916.1) | 0.172 |