Table 4. Number of PHC centers, population, rate of PHCs per 10,000 populations, cumulative population, and cumulative PHCs of 20 Saudi health regions in 2018.
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 | 447 | 18.7 | 18.7 | 8,446,866 | 21.1207587 | 0.529 | 21.120759 | 0 | 21.12076 | 394.9582 |
| Makkah | 85 | 3.6 | 22.3 | 8,803,545 | 22.0126079 | 0.096 | 43.133367 | 21.120759 | 64.25413 | 231.3149 |
| Jeddah | 95 | 4 | 26.3 | 3,497,653 | 8.74562057 | 0.271 | 51.878987 | 43.133367 | 95.01235 | 380.0494 |
| Taif | 121 | 5.1 | 31.4 | 987,914 | 2.47020531 | 1.22 | 54.349193 | 51.878987 | 106.2282 | 541.7637 |
| Madinah | 159 | 6.7 | 38.1 | 2,188,138 | 5.47127594 | 0.726 | 59.820469 | 54.349193 | 114.1697 | 764.9367 |
| Qaseem | 183 | 7.7 | 45.8 | 1,455,693 | 3.63985182 | 1.25 | 63.46032 | 59.820469 | 123.2808 | 949.2621 |
| Eastern region | 143 | 6 | 51.8 | 5,028,753 | 12.574022 | 0.284 | 76.034342 | 63.46032 | 139.4947 | 836.968 |
| Al-Ahsa | 72 | 3 | 54.8 | 1,078,654 | 2.69709391 | 0.667 | 78.731436 | 76.034342 | 154.7658 | 464.2973 |
| Hafar Al-Batin | 40 | 1.7 | 56.5 | 389,993 | 0.97514842 | 1.02 | 79.706585 | 78.731436 | 158.438 | 269.3446 |
| Aseer | 254 | 10.6 | 67.1 | 2,261,618 | 5.6550072 | 1.12 | 85.361592 | 79.706585 | 165.0682 | 1749.723 |
| Bishah | 85 | 3.6 | 70.7 | 205,346 | 0.51345236 | 4.13 | 85.875044 | 85.361592 | 171.2366 | 616.4519 |
| Tabouk | 96 | 4 | 74.7 | 930,507 | 2.32666338 | 1.03 | 88.201708 | 85.875044 | 174.0768 | 696.307 |
| Hail | 111 | 4.6 | 79.3 | 716,021 | 1.79035713 | 1.55 | 89.992065 | 88.201708 | 178.1938 | 819.6914 |
| Northern region | 48 | 2 | 81.3 | 375,310 | 0.93843467 | 1.27 | 90.930499 | 89.992065 | 180.9226 | 361.8451 |
| Jazan | 170 | 7.1 | 88.4 | 1,603,659 | 4.00982977 | 1.06 | 94.940329 | 90.930499 | 185.8708 | 1319.683 |
| Najran | 68 | 2.8 | 91.2 | 595,705 | 1.48951594 | 1.14 | 96.429845 | 94.940329 | 191.3702 | 535.8365 |
| Al-Bahah | 108 | 4.5 | 95.7 | 487,108 | 1.21797724 | 2.21 | 97.647822 | 96.429845 | 194.0777 | 873.3495 |
| Al-Jouf | 43 | 1.8 | 97.5 | 520,737 | 1.30206405 | 0.825 | 98.949886 | 97.647822 | 196.5977 | 353.8759 |
| Qurayyat | 19 | 0.8 | 98.3 | 147,550 | 0.36893777 | 1.28 | 99.318824 | 98.949886 | 198.2687 | 158.615 |
| Qunfudah | 43 | 1.8 | 100.1 | 272,424 | 0.6811759 | 1.57 | 100 | 99.318824 | 199.3188 | 358.7739 |
| Total | 2390 | - | - | - | - | - | - | - | - | 12677.05 |