Table 1 Baseline characteristics
Variable | RSV | Control | p-value |
|---|---|---|---|
(n = 11,432) | (n = 11,432) | ||
Mean age, (SD [median]) | 15.8 (24.5 [2]) | 15.8 (24.5 [2]) | NC |
 1 year, n (%) | 4078 (35.7) | 4078 (35.7) |  |
 2–4 years, n (%) | 3142 (27.5) | 3142 (27.5) |  |
 5–17 years, n (%) | 1290 (11.3) | 1290 (11.3) |  |
 18–49 years, n (%) | 1226 (10.7) | 1226 (10.7) |  |
 50–64 years, n (%) | 894 (7.8) | 894 (7.8) |  |
 65–74 years, n (%) | 294 (2.6) | 294 (2.6) |  |
 75–84 years, n (%) | 290 (2.5) | 290 (2.5) |  |
  ≥ 85 years, n (%) | 218 (1.9) | 218 (1.9) |  |
Male sex, n (%) | 5870 (51.3) | 5870 (51.3) | NC |
Insurance, n (%) | |||
 Commercial | 10,609 (92.8) | 10,609 (92.8) | NC |
 Medicare | 823 (7.2) | 823 (7.2) |  |
US geographic regiona, n (%) | |||
 Northeast | 1576 (13.8) | 1595 (14.0) | NC |
 North-central | 2804 (24.5) | 2803 (24.5) |  |
 South | 4775 (41.8) | 4734 (41.4) |  |
 West | 2114 (18.5) | 2137 (18.7) |  |
 Unknown | 163 (1.4) | 163 (1.4) |  |
Prematurity,b n (%) | 914 (12.7) | 542 (7.5) | < 0.0001 |
 If preterm, unspecified gestational week, n (%) | 351 (38.4) | 227 (41.9) |  |
History of RSV during the baseline period, n (%) | 1055 (9.2) | 150 (1.3) | < 0.0001 |
Index event during the epidemic season, n (%) | 11,030 (96.5) | – |  |
Service location of the index event, n (%) | |||
 Hospitalization | 577 (5.0) | – |  |
 ED/UC | 1283 (11.2) | – |  |
 Ambulatory | 322 (2.8) | – |  |
 Outpatient | 9250 (80.9) | – |  |