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Table 1 Baseline characteristics

From: Healthcare resource use and economic burden attributable to respiratory syncytial virus in the United States: a claims database analysis

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)  
  1. ED: emergency department, NC: not calculated, RSV: respiratory syncytial virus, UC: urgent care
  2. a Region: Northeast: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont, New Jersey, New York, Pennsylvania; North-Central: Illinois, Indiana, Michigan, Ohio, Wisconsin, Iowa, Kansas, Minnesota, Missouri, Nebraska, North and South Dakota; South: Delaware, District of Columbia, Florida, Georgia, Maryland, North and South Carolina, Virginia, West Virginia, Alabama, Kentucky, Mississippi, Tennessee, Arkansas, Louisiana, Oklahoma, Texas; West: Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, Wyoming, Alaska, California, Hawaii, Oregon, Washington
  3. b Percentage among children < 5 years old (n = 7220). Prematurity information was not captured in the database for older patients