Table 1.
Estimated National influenza‐associated hospitalizations and deaths in Oman 2012‐2015
| Year | Age group (y) | Population sizea | Severe acute respiratory infection | Annual percentage of influenza positivityd | Estimated influenza‐associated (per 100 000) | ||
|---|---|---|---|---|---|---|---|
| Hospitalizationsb | Mortalityc | Hospitalizationse rate (95% CI) | Deathsf rate (95% CI) | ||||
| 2012 | <1 | 63 183 (1.7%) | 1059 (26.3%) | 14 (10.3%) | 7.9% | 148.6 (118.6‐178.7) | 2.5 (−1.4‐6.4) |
| 1‐<5 | 259 658 (7.2%) | 1218 (30.3%) | 3 (2.2%) | 14.9% | 59.1 (49.8‐68.5) | 0.2 (−0.3‐0.7) | |
| 5‐<15 | 476 292 (13.1%) | 449 (11.1%) | 4 (2.9%) | 17.2% | 16.3 (12.7‐20.0) | 0.2 (−0.2‐0.5) | |
| 15‐<50 | 2 464 564 (68.0%) | 486 (12.1%) | 14 (10.3%) | 28.2% | 4.5 (3.6‐5.3) | 0.1 (0.0‐0.3) | |
| 50‐<65 | 263 314 (7.3%) | 263 (6.5%) | 10 (7.3%) | 32.6% | 27 (20.7‐33.3) | 0.8 (−0.3‐1.9) | |
| ≥65 | 95 990 (2.6%) | 549 (13.6%) | 91 (6.6%) | 29.5% | 111.1 (90.0‐132.2) | 19.1 (10.3‐27.8) | |
| Total | 3 623 001 (100%) | 4024 (100%) | 136 (100%) | 269/1427 (18.8%) | 19.0 (17.6‐20.5) | 0.7 (0.4‐1) | |
| 2013 | <1 | 66 504 (1.7%) | 1233 (29.9%) | 9 (4.5%) | 2.8% | 61.0 (42.2‐79.8) | 1.1 (−1.3‐3.6) |
| 1‐<5 | 276 627 (7.2%) | 1177 (28.5%) | 4 (2.0%) | 3.7% | 19.7 (14.5‐24.9) | 0.1 (−0.3‐0.6) | |
| 5‐<15 | 492 100 (12.8%) | 421 (10.2%) | 4 (2.0%) | 5.7% | 5.1 (3.1‐7.1) | 0.1 (−0.2‐0.3) | |
| 15‐<50 | 2 645 447 (68.6%) | 450 (10.9%) | 24 (12.0%) | 12.3% | 1.9 (1.4‐2.5) | 0.1 (0.0‐0.3) | |
| 50‐<65 | 275 916 (7.1%) | 280 (6.8%) | 34 (17.0%) | 11.3% | 12.1 (8.0‐16.2) | 1.4 (0.0‐2.7) | |
| ≥65 | 98 604 (2.6%) | 568 (13.8%) | 125 (62.5%) | 9.7% | 53.4 (38.9‐67.8) | 12.6 (5.6‐19.6) | |
| Total | 3 855 198 (100%) | 4129 (100%) | 200 (100%) | 175/2703 (6.4%) | 7.3 (6.4‐8.1) | 0.4 (0.2‐0.5) | |
| 2014 | <1 | 71 009 (1.8%) | 1338 (25.8%) | 11 (4.8%) | 5.4% | 113.1 (88.4‐137.9) | 1.1 (−1.3‐3.6) |
| 1‐<5 | 290 786 (7.3%) | 1528 (29.4%) | 6 (2.7%) | 11.6% | 61.5 (52.5‐70.5) | 0.3 (−0.3‐0.9) | |
| 5‐<15 | 522 888 (13.1%) | 465 (9.0%) | 5 (2.2%) | 16.1% | 12.4 (9.4‐15.4) | 0.1 (−0.2‐0.4) | |
| 15‐<50 | 2 718 234 (68.1%) | 686 (13.2%) | 16 (7.0%) | 25.6% | 5.9 (5.0‐6.8) | 0.1 (0.0‐0.3) | |
| 50‐<65 | 288 751 (7.2%) | 450 (8.7%) | 31 (13.8%) | 23.2% | 34.5 (27.7‐41.3) | 2.7 (0.8‐4.5) | |
| ≥65 | 101 225 (2.5%) | 723 (14.0%) | 161 (70.9%) | 21.6% | 182.8 (156.5‐209.1) | 39.5 (27.3‐51.8) | |
| Total | 3 992 893 (100%) | 5190 (100%) | 230 (100%) | 903/5654 (15.9%) | 19.7 (18.3‐21.2) | 0.9 (0.6‐1.2) | |
| 2015 | <1 | 75 057 (1.7%) | 1744 (28.8%) | 14 (5.0%) | 7.2% | 175.1 (145.2‐20.50) | 1.7 (−1.2‐4.7) |
| 1‐<5 | 306 600 (7.0%) | 1911 (31.5%) | 7 (2.5%) | 17.6% | 106.3 (94.7‐117.8) | 0.3 (−0.3‐1.0) | |
| 5‐<15 | 546 957 (12.3%) | 502 (8.3%) | 2 (0.7%) | 20.0% | 25.0 (20.8‐29.1) | 0.1 (−0.2‐0.5) | |
| 15‐<50 | 2 819 813 (64.9%) | 610 (10.1%) | 42 (15.0%) | 29.9% | 6.2 (5.3‐7.2) | 0.4 (0.2‐0.7) | |
| 50‐<65 | 302 338 (6.9%) | 399 (6.6%) | 35 (12.4%) | 32.5% | 40.8 (33.6‐48.0) | 3.5 (1.4‐5.7) | |
| ≥65 | 295 819 (6.8%) | 896 (14.7%) | 181 (64.4%) | 22.3% | 62.2 (53.2‐71.1) | 11.3 (7.5‐15.1) | |
| Total | 4 346 584 (100%) | 6062 (100%) | 281 (100%) | 1515/7357 (20.6%) | 27.5 (25.9‐29.0) | 1.2 (0.9‐1.5) | |
| 2012‐2015 | <1 | 275 801 (1.7%) | 5374 (27.7%) | 48 (5.7%) | 5.9% | 121.3 (108.4‐134.3) | 1.1 (−0.1‐2.4) |
| 1‐<5 | 1 133 671 (7.2%) | 5834 (30.0%) | 20 (2.7%) | 13.2% | 71.7 (66.8‐76.6) | 0.3 (0.0‐0.6) | |
| 5‐<15 | 2 038 237 (12.8%) | 1837 (9.5%) | 15 (1.7%) | 29.9% | 6.2 (5.3‐7.2) | 0.4 (0.2‐0.7) | |
| 15‐<50 | 10 648 058 (67.4%) | 2232 (11.5%) | 96 (11.3%) | 25.7% | 5.3 (4.9‐5.8) | 0.2 (0.1‐0.3) | |
| 50‐<65 | 1 130 319 (7.1%) | 1392 (7.2%) | 110 (13.0%) | 26% | 32.1 (28.8‐35.4) | 2.2 (1.4‐3.1) | |
| ≥65 | 591 638 (3.7%) | 2736 (14.1%) | 558 (65.8%) | 20.4% | 92.3 (84.6‐100.1) | 18.6 (15.1‐22.1) | |
| Total | 15 817 724 (100%) | 19 405 (100%) | 847 (100%) | 2862/17 141 (16.7%) | 20.6 (19.9‐21.3) | 0.9 (0.7‐1.0) | |
population census based on National Center for Statistics and Information by age group for Omanis and non‐Omanis.
Number of persons hospitalized during the year with severe acute respiratory infection (SARI) proxy diagnoses (ICD‐10 codes J9‐18).
Number of deaths among persons hospitalized during the year with SARI proxy diagnoses (ICD‐10 codes J9‐18).
Annual number respiratory samples positive for influenza through PCR over total number tested (percentage). (Not used in the formula).
Sum of the products of the proportion of samples testing positive for influenza and the number of persons hospitalized with by age group and month. Rate per 100 000 population.
Sum of the product of the proportion of samples testing positive for influenza and the number of persons dying by age group and month. Rate per 100 000 population.