Baseline characteristics of Ontario residents vaccinated in the 2013/14 and 2015/16 influenza seasons, by age group and location of vaccination provider
| Characteristic | 2013/14 influenza season; location of vaccination, no. (%) of patients* | 2015/16 influenza season, location of vaccination no. (%) of patients* | ||||||
|---|---|---|---|---|---|---|---|---|
| Age ≤ 65 yr | Age ≥ 66 yr | Age ≤ 65 yr | Age ≤ 66 yr | |||||
| Pharmacy n = 555 913 | Physician’s office n = 1 135 212 | Pharmacy n = 201 816 | Physician’s office n = 784 346 | Pharmacy n = 567 539 | Physician’s office n = 883 055 | Pharmacy n = 292 255 | Physician’s office n = 722 329 | |
| Demographic | ||||||||
| Age at vaccination, yr, mean ± SD | 42.35 ± 17.79 | 40.02 ± 20.46 | 74.58 ± 6.95 | 75.99 ± 7.20 | 43.35 ± 17.75 | 40.73 ± 20.41 | 74.89 ± 7.03 | 76.09 ± 7.27 |
| Female sex | 303 116 (54.5) | 627 361 (55.3) | 110 136 (54.6) | 428 674 (54.7) | 311 438 (54.9) | 491 171 (55.6) | 159 545 (54.6) | 392 979 (54.4) |
| Rurality Index of Ontario score | ||||||||
| Urban | 400 929 (72.1) | 900 265 (79.3) | 128 967 (63.9) | 554 548 (70.7) | 407 899 (71.9) | 704 958 (79.8) | 182 367 (62.4) | 516 802 (71.5) |
| Nonmajor urban | 128 929 (23.2) | 199 741 (17.6) | 58 752 (29.1) | 190 992 (24.4) | 132 262 (23.3) | 151 809 (17.2) | 88 473 (30.3) | 171 354 (23.7) |
| Rural | 26 055 (4.7) | 35 206 (3.1) | 14 097 (7.0) | 38 806 (4.9) | 27 378 (4.8) | 26 288 (3.0) | 21 415 (7.3) | 34 173 (4.7) |
| Neighbourhood income quintile | ||||||||
| 1 (lowest) | 81 645 (14.7) | 215 212 (19.0) | 31 307 (15.5) | 135 463 (17.3) | 84 275 (14.8) | 163 833 (18.6) | 44 625 (15.3) | 122 375 (16.9) |
| 2 | 94 213 (16.9) | 221 639 (19.5) | 37 899 (18.8) | 160 329 (20.4) | 96 782 (17.1) | 172 238 (19.5) | 53 953 (18.5) | 146 153 (20.2) |
| 3 | 106 402 (19.1) | 227 810 (20.1) | 38 281 (19.0) | 156 294 (19.9) | 109 083 (19.2) | 177 109 (20.1) | 56 336 (19.3) | 144 092 (19.9) |
| 4 | 125 795 (22.6) | 239 132 (21.1) | 43 712 (21.7) | 163 581 (20.9) | 130 181 (22.9) | 191 164 (21.6) | 63 825 (21.8) | 154 003 (21.3) |
| 5 (highest) | 147 858 (26.6) | 231 419 (20.4) | 50 617 (25.1) | 168 679 (21.5) | 147 218 (25.9) | 178 711 (20.2) | 73 516 (25.2) | 155 706 (21.6) |
| Low income | NA | NA | 19 746 (9.8) | 124 216 (15.8) | NA | NA | 26 320 (9.0) | 103 719 (14.4) |
| Month of vaccination | ||||||||
| October | 139 731 (25.1) | 440 771 (38.8) | 85 260 (42.2) | 450 054 (57.4) | 99 753 (17.6) | 245 473 (27.8) | 82 537 (28.2) | 309 345 (42.8) |
| November | 237 952 (42.8) | 418 580 (36.9) | 87 501 (43.4) | 262 335 (33.4) | 343 003 (60.4) | 421 753 (47.8) | 172 606 (59.1) | 324 576 (44.9) |
| December | 59 119 (10.6) | 124 597 (11.0) | 13 857 (6.9) | 45 878 (5.8) | 95 324 (16.8) | 150 302 (17.0) | 29 988 (10.3) | 67 038 (9.3) |
| January | 113 432 (20.4) | 129 580 (11.4) | 14 556 (7.2) | 22 433 (2.9) | 23 256 (4.1) | 47 380 (5.4) | 5913 (2.0) | 16 638 (2.3) |
| February | 4823 (0.9) | 17 492 (1.5) | 569 (0.3) | 2998 (0.4) | 4808 (0.8) | 13 865 (1.6) | 1029 (0.4) | 3732 (0.5) |
| March | 856 (0.2) | 4192 (0.4) | 73 (0.04) | 648 (0.1) | 1395 (0.2) | 4282 (0.5) | 182 (0.1) | 1000 (0.1) |
| Time since immigration, yr | ||||||||
| Nonimmigrant | 494 681 (89.0) | 920 309 (81.1) | 194 136 (96.2) | 716 582 (91.4) | 503 451 (88.7) | 719 352 (81.5) | 279 858 (95.8) | 656 326 (90.9) |
| < 5 | 11 552 (2.1) | 40 211 (3.5) | 813 (0.4) | 5469 (0.7) | 6013 (1.1) | 14 291 (1.6) | 600 (0.2) | 2886 (0.4) |
| 5–9 | 13 002 (2.3) | 44 758 (3.9) | 1009 (0.5) | 7729 (1.0) | 13 808 (2.4) | 33 501 (3.8) | 1609 (0.6) | 7656 (1.1) |
| ≥ 10 | 36 678 (6.6) | 129 934 (11.4) | 5858 (2.9) | 54 566 (7.0) | 44 267 (7.8) | 115 911 (13.1) | 10 188 (3.5) | 55 461 (7.7) |
| Comorbidity | ||||||||
| Diabetes | 54 584 (9.8) | 168 581 (14.9) | 53 936 (26.7) | 264 997 (33.8) | 62 665 (11.0) | 144 678 (16.4) | 81 964 (28.0) | 256 396 (35.5) |
| Hypertension | 121 978 (21.9) | 308 227 (27.2) | 140 459 (69.6) | 611 099 (77.9) | 130 272 (23.0) | 245 319 (27.8) | 204 878 (70.1) | 562 473 (77.9) |
| Chronic obstructive pulmonary disease | 9398 (1.7) | 26 884 (2.4) | 17 440 (8.6) | 80 492 (10.3) | 10 869 (1.9) | 22 807 (2.6) | 25 416 (8.7) | 74 029 (10.2) |
| Asthma | 95 131 (17.1) | 205 529 (18.1) | 25 396 (12.6) | 115 787 (14.8) | 99 150 (17.5) | 162 238 (18.4) | 38 815 (13.3) | 110 502 (15.3) |
| Congestive heart failure | 4817 (0.9) | 14 809 (1.3) | 15 172 (7.5) | 81 333 (10.4) | 5630 (1.0) | 12 601 (1.4) | 22 626 (7.7) | 75 666 (10.5) |
| Acute myocardial infarction | 5906 (1.1) | 15 179 (1.3) | 10 648 (5.3) | 45 921 (5.9) | 6190 (1.1) | 12 374 (1.4) | 15 243 (5.2) | 42 086 (5.8) |
| Cancer† | 18 570 (3.3) | 40 066 (3.5) | 30 555 (15.1) | 121 804 (15.5) | 23 249 (4.1) | 37 210 (4.2) | 49 457 (16.9) | 125 255 (17.3) |
| Use of health care services in previous year | ||||||||
| Influenza vaccination in physician’s office | 132 308 (23.8) | 537 155 (47.3) | 92 143 (45.7) | 593 096 (75.6) | 91 801 (16.2) | 406 390 (46.0) | 87 363 (29.9) | 515 454 (71.4) |
| Influenza vaccination in community pharmacy | 93 868 (16.9) | 27 364 (2.4) | 33 207 (16.4) | 15 944 (2.0) | 281 121 (49.5) | 82 324 (9.3) | 156 379 (53.5) | 74 034 (10.2) |
| Hospital admission | 23 828 (4.3) | 80 604 (7.1) | 19 907 (9.9) | 93 660 (11.9) | 24 557 (4.3) | 66 061 (7.5) | 28 519 (9.8) | 86 168 (11.9) |
| Emergency department visit | 121 020 (21.8) | 268 251 (23.6) | 55 602 (27.6) | 227 776 (29.0) | 124 111 (21.9) | 213 063 (24.1) | 81 315 (27.8) | 214 099 (29.6) |
| Home care | 14 442 (2.6) | 37 564 (3.3) | 23 233 (11.5) | 113 629 (14.5) | 15 529 (2.7) | 30 896 (3.5) | 33 233 (11.4) | 104 690 (14.5) |
| No. of physician office visits, mean ± SD | 8.43 ± 12.25 | 11.25 ± 14.15 | 14.30 ± 15.83 | 18.02 ± 18.59 | 8.83 ± 12.86 | 11.72 ± 14.91 | 14.17 ± 15.67 | 17.92 ± 18.70 |
| Periodic health examination | 36 291 (6.5) | 79 012 (7.0) | 16 748 (8.3) | 66 430 (8.5) | 30 867 (5.4) | 45 541 (5.2) | 18 865 (6.5) | 43 415 (6.0) |
| Use of pharmacy services in previous year | ||||||||
| No. of unique prescription medications, mean ± SD | NA | NA | 9.59 ± 6.31 | 10.27 ± 6.94 | NA | NA | 9.65 ± 6.25 | 10.18 ± 6.90 |
| Total cost of prescription medications, $ | NA | NA | 1373.28 ± 3764.67 | 1596.94 ± 3343.26 | NA | NA | 1446.58 ± 4113.70 | 1655.59 ± 3731.92 |
| < 500 | NA | NA | 83 738 (41.5) | 260 435 (33.2) | NA | NA | 125 613 (43.0) | 253 066 (35.0) |
| 500–999 | NA | NA | 42 057 (20.8) | 168 536 (21.5) | NA | NA | 60 133 (20.6) | 152 874 (21.2) |
| 1000–1999 | NA | NA | 39 853 (19.7) | 177 024 (22.6) | NA | NA | 53 761 (18.4) | 153 428 (21.2) |
| 2000–2999 | NA | NA | 17 184 (8.5) | 82 927 (10.6) | NA | N/A | 24 409 (8.4) | 74 183 (10.3) |
| 3000–3999 | NA | NA | 7943 (3.9) | 39 555 (5.0) | NA | N/A | 10 827 (3.7) | 34 964 (4.8) |
| ≥ 4000 | NA | NA | 11 041 (5.5) | 55 869 (7.1) | NA | NA | 17 512 (6.0) | 53 814 (7.5) |
| Pharmacist service | 59 275 (10.7) | 122 507 (10.8) | 75 413 (37.4) | 285 434 (36.4) | 63 983 (11.3) | 102 774 (11.6) | 103 553 (35.4) | 260 805 (36.1) |
| Pharmacist service on day of vaccination | 4238 (0.8) | 3387 (0.3) | 4848 (2.4) | 6835 (0.9) | 4760 (0.8) | 2913 (0.3) | 7117 (2.4) | 6074 (0.8) |