Table 1.
Demographic characteristics of patients with respiratory syncytial virus (RSV)-specific ICD-9-CM codes*
| Variable, n (%) | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2008-2014 |
|
|---|---|---|---|---|---|---|---|---|---|
|
(n = 46 457) |
(n = 58 112) |
(n = 63 915) |
(n = 74 858) |
(n = 76 638) |
(n = 58 497) |
(n = 48 812) |
mean† |
||
| Age (in years), mean (SD) |
10.9 (20.8) |
10.5 (20.1) |
9.6 (19.9) |
8.7 (19.3) |
7.5 (18.2) |
7.7 (18.9) |
7.5 (18.4) |
8.9 |
|
| Age (in years), median |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
|
Age (in years), category, n (%): | |||||||||
| <1 |
21 024 (45.3) |
24 990 (43.0) |
28 233 (44.2) |
34 196 (45.7) |
35 864 (46.8) |
28 253 (48.3) |
23 221 (47.6) |
45.8% |
|
| 1 |
7785 (16.8) |
9971 (17.2) |
12 005 (18.8) |
14 518 (19.4) |
15 537 (20.3) |
11 552 (19.7) |
10 099 (20.7) |
19.0% |
|
| 2-4 |
5361 (11.5) |
7450 (12.8) |
8956 (14.0) |
10 515 (14.0) |
11 334 (14.8) |
8411 (14.4) |
7026 (14.4) |
13.7% |
|
| 5-17 |
3063 (6.6) |
4762 (8.2) |
4076 (6.4) |
4563 (6.1) |
4371 (5.7) |
3045 (5.2) |
2580 (5.3) |
6.2% |
|
| 18-49 |
4774 (10.3) |
5723 (9.8) |
5142 (8.0) |
5183 (6.9) |
4433 (5.8) |
3031 (5.2) |
2408 (4.9) |
7.3% |
|
| 50-64 |
2982 (6.4) |
3499 (6.0) |
3498 (5.5) |
3494 (4.7) |
2885 (3.8) |
2168 (3.7) |
2028 (4.2) |
4.9% |
|
| 65-74 |
536 (1.2) |
706 (1.2) |
831 (1.3) |
914 (1.2) |
806 (1.1) |
748 (1.3) |
531 (1.1) |
1.2% |
|
| 75-84 |
551 (1.2) |
628 (1.1) |
707 (1.1) |
817 (1.1) |
730 (1.0) |
683 (1.2) |
441 (0.9) |
1.1% |
|
| ≥85 |
381 (0.8) |
383 (0.7) |
467 (0.7) |
658 (0.9) |
678 (0.9) |
606 (1.0) |
478 (1.0) |
0.9% |
|
| Male |
24 848 (53.5) |
30 957 (53.3) |
34 428 (53.9) |
40 284 (53.8) |
41 674 (54.4) |
31 610 (54.0) |
26 460 (54.2) |
53.9% |
|
|
Insurance: | |||||||||
| Commercial‡† |
44 968 (96.8) |
56 362 (97.0) |
61 876 (96.8) |
72 438 (96.8) |
74 386 (97.1) |
56 427 (96.5) |
47 327 (97.0) |
96.8% |
|
| Medicare§ |
1489 (3.2) |
1750 (3.0) |
2039 (3.2) |
2420 (3.2) |
2252 (2.9) |
2070 (3.5) |
1485 (3.0) |
3.2% |
|
|
US geographic region: | |||||||||
| Northeast |
4032 (8.7) |
7703 (13.3) |
9174 (14.4) |
12 376 (16.5) |
11 050 (14.4) |
8838 (15.1) |
8933 (18.3) |
14.4% |
|
| North-central |
10 367 (22.3) |
13 312 (22.9) |
13 287 (20.8) |
16 367 (21.9) |
15 993 (20.9) |
11 479 (19.6) |
8958 (18.4) |
21.0% |
|
| South |
25 202 (54.2) |
29 771 (51.2) |
29 048 (45.4) |
32 244 (43.1) |
37 582 (49.0) |
26 457 (45.2) |
23 026 (47.2) |
47.9% |
|
| West |
6464 (13.9) |
7154 (12.3) |
11 523 (18.0) |
11 681 (15.6) |
10 354 (13.5) |
10 005 (17.1) |
6408 (13.1) |
14.8% |
|
| Unknown | 392 (0.8) | 172 (0.3) | 883 (1.4) | 2190 (2.9) | 1659 (2.2) | 1718 (2.9) | 1487 (3.0) | 1.9% |
|
*Includes patients with an RSV-specific ICD-9-CM code (079.6, 466.11 or 480.1).
†Means over the entire study period were calculated by dividing the sum of percentages for qualitative variable – means and medians for continuous variable, by the number of years (7).
‡Commercial: CCAE – Active employees and dependent, early (non-Medicare) retirees and dependents, and COBRA continuers.
§Medicare: Retirees (>65 y), their dependents, and younger people with disabilities.