Table 7. Number of PHC centers, population, rate of PHCs per 10,000 populations, cumulative population, and cumulative PHCs of 20 Saudi health regions in 2021.
Pi: percentage of primary healthcare centers; Si: cumulative population; PHC: primary healthcare
| Health regions | PHCs no. | Percentage of PHCs (Pi) | Cumulative PHCS | Population | Percentage of population | Rate of PHCs per 10,000 population | Cumulative population (Si) | Si-1 | (Si-1+Si) | (Si-1+Si)*Pi |
| Riyadh | 390 | 18.4 | 18.4 | 8,796,548 | 20.964221 | 0.443 | 20.964221 | 0 | 20.96422 | 385.7417 |
| Makkah | 77 | 3.5 | 21.9 | 9,135,437 | 21.771873 | 0.084 | 42.736094 | 20.964221 | 63.70032 | 222.9511 |
| Jeddah | 92 | 4.3 | 26.2 | 3,685,432 | 8.7832422 | 0.249 | 51.519336 | 42.736094 | 94.25543 | 405.2983 |
| Taif | 109 | 5.1 | 31.3 | 997,438 | 2.3771269 | 1.09 | 53.896463 | 51.519336 | 105.4158 | 537.6206 |
| Madinah | 144 | 6.9 | 38.2 | 2,354,336 | 5.6109306 | 0.611 | 59.507393 | 53.896463 | 113.4039 | 782.4866 |
| Qaseem | 155 | 6.9 | 45.1 | 1,575,854 | 3.7556268 | 0.983 | 63.26302 | 59.507393 | 122.7704 | 847.1158 |
| Eastern region | 119 | 6.1 | 51.2 | 5,321,432 | 12.682211 | 0.223 | 75.945231 | 63.26302 | 139.2083 | 849.1703 |
| Al-Ahsa | 63 | 2.9 | 54.1 | 1,091,236 | 2.6006694 | 0.577 | 78.5459 | 75.945231 | 154.4911 | 448.0243 |
| Hafar Al-Batin | 36 | 1.6 | 55.7 | 389,993 | 0.9294441 | 0.923 | 79.475344 | 78.5459 | 158.0212 | 252.834 |
| Aseer | 213 | 10.8 | 66.5 | 2,473,226 | 5.8942732 | 0.861 | 85.369618 | 79.475344 | 164.845 | 1780.326 |
| Bishah | 64 | 3.2 | 69.7 | 205,346 | 0.4893873 | 3.11 | 85.859005 | 85.369618 | 171.2286 | 547.9316 |
| Tabouk | 90 | 4.2 | 73.9 | 973,252 | 2.319486 | 0.924 | 88.178491 | 85.859005 | 174.0375 | 730.9575 |
| Hail | 109 | 4.9 | 78.8 | 752,365 | 1.7930609 | 1.44 | 89.971552 | 88.178491 | 178.15 | 872.9352 |
| Northern region | 41 | 1.9 | 80.7 | 39,897 | 0.0950838 | 10.2 | 90.066636 | 89.971552 | 180.0382 | 342.0726 |
| Jazan | 155 | 7.4 | 88.1 | 1,768,732 | 4.2153 | 0.876 | 94.281936 | 90.066636 | 184.3486 | 1364.179 |
| Najran | 68 | 3.1 | 91.2 | 629,543 | 1.5003475 | 1.08 | 95.782283 | 94.281936 | 190.0642 | 589.1991 |
| Al-Bahah | 94 | 4.2 | 95.4 | 499,874 | 1.1913161 | 1.88 | 96.973599 | 95.782283 | 192.7559 | 809.5747 |
| Al-Jouf | 41 | 1.9 | 97.3 | 541,432 | 1.2903585 | 0.757 | 98.263958 | 96.973599 | 195.2376 | 370.9514 |
| Qurayyat | 17 | 0.9 | 98.2 | 147,550 | 0.351646 | 1.15 | 98.615604 | 98.263958 | 196.8796 | 177.1916 |
| Qunfudah | 44 | 1.9 | 100.1 | 272,424 | 0.6492498 | 1.61 | 99.264854 | 98.615604 | 197.8805 | 375.9729 |
| Total | 2121 | - | - | - | - | - | - | - | - | 12692.53 |