TABLE 1

Patient and Hospital Characteristics of US Children <2 Years With Bronchiolitis, 2000–2009a

Variables2000200320062009P for Trend
Age 0–23.9 mo
 Weighted sample, n136 769142 118137 777128 164
 % of total hospitalizationsb16 (16–17)16 (16–17)16 (15–16)16 (16–17).48
Age 0–11.9 mo
 Weighted sample, n118 910121 411116 200104 985
 % of total hospitalizationsc19 (18–19)18 (17–18)18 (17–18)18 (17–18).02
Patient
 Age<.001
 0–11.9 mo87 (84–86)86 (85–86)85 (84–85)82 (81–83)
 12–23.9 mo13 (12–14)14 (14–15)15 (15–16)18 (17–19)
 Male gender59 (59–60)59 (59–60)58 (58–59)59 (58–59).03
 Race or ethnic group
  Non-Hispanic white42 (39–45)34 (32–36)35 (32–37)38 (36–41).05
  Non-Hispanic black13 (12–15)12 (11–13)11 (10–12)14 (12–16).57
  Hispanic21 (19–24)20 (18–23)22 (19–25)25 (22–27).01
  Other or unknown24 (21–26)34 (31–37)33 (29–36)23 (20–26).74
 Type of health insurance
  Public53 (51–55)57 (56–59)60 (58–61)63 (62–65)<.001
  Private41 (39–43)37 (35–39)34 (33–38)31 (30–33)<.001
  Other6 (6–7)6 (5–2)6 (5–7)6 (5–7).74
 Admission day.001
  Weekdayd78 (77–78)77 (77–78)77 (77–78)77 (76–77)
  Weekend22 (22–23)23 (22–23)22 (22–23)23 (23–24)
 Any high-risk conditione6 (5–6)6 (5–6)7 (6–7)8 (7–8)<.001
Hospital
 Region
  Northeast18 (15–22)16 (14–18)17 (15–20)18 (15–22).90
  Midwest18 (14–21)22 (19–25)23 (19–26)20 (17–24).15
  South40 (36–44)42 (38–45)39 (36–43)39 (35–44).06
  West24 (20–28)20 (17–24)21 (17–24)22 (19–26).28
 Location/teaching status
  Rural20 (18–23)20 (18–22)16 (15–18)17 (15–18).005
  Urban nonteaching31 (28–35)33 (30–36)31 (28–35)33 (29–36).82
  Urban teaching48 (44–52)47 (43–50)52 (49–56)51 (47–55).06
 Hospital designation<.001
  Non–children’s hospital72 (67–77)72 (70–76)65 (61–69)64 (59–68)
  Children’s hospital28 (23–33)28 (24–32)35 (31–40)36 (32–41)
  • a Data are expressed as % (95% CI) otherwise indicated.

  • b Annual proportion of bronchiolitis hospitalizations among the total hospitalizations for children aged <2 y, after excluding routine birth.

  • c Annual proportion of bronchiolitis hospitalizations among the total hospitalizations for children aged <1 y, after excluding routine birth.

  • d Admission on Monday, Tuesday, Wednesday, Thursday, and Friday.

  • e High-risk medical condition was defined as history of prematurity or ≥1 complex medical condition, previously defined by using ICD-9-CM codes in 9 categories of illness (ie, neuromuscular, cardiovascular, respiratory, renal, gastrointestinal, hematology or immunologic, metabolic, malignancy, and other congenital or genetic defect disorders).