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Table 2 Demographics and characteristics of bronchiolitis hospitalizations, 2010–2014

From: Epidemiology of bronchiolitis: a description of emergency department visits and hospitalizations in Puerto Rico, 2010–2014

  Years, n (%)
Characteristics 2010 2011 2012 2013 2014 P value
Demographics (n = 941) (n = 1209) (n = 1076) (n = 969) (n = 791)  
Sexa
Male 565 (32) 705 (41) 586 (42) 582 (42) 485 (40) 0.019
Female 376 (20) 504 (37) 490 (41) 387 (36) 306 (35)  
Age distributionb
0 to 3 months 124 (14) 176 (41) 134 (40) 88 (34) 91 (39) < 0.001
3.1 to 6 months 190 (44) 289 (58) 233 (59) 120 (39) 169 (55)  
6.1 to 9 months 183 (43) 225 (54) 213 (56) 93 (30) 125 (45)  
9.1 to 12 months 137 (34) 153 (40) 158 (46) 80 (29) 116 (42)  
12.1 to 24 months 307 (21) 366 (28) 338 (29) 588 (44) 290 (29)  
Cost per hospitalization
Mean $4016 $4313 $4269 $4277 $4725 0.0015
Standard deviation $3215 $2812 $3606 $3794 $3128  
Cost per day (mean) $852 $865 $851 $910 $948  
Total charges per year $3,779,161 $5,214,823 $4,593,615 $4,144,186 $3,737,647  
Hospitalizations (n = 924) (n = 1219) (n = 1140) (n = 969) (n = 798)  
ICD-9-CM Code
466 61 (7) 52 (4) 55 (5) 64 (7) 38 (5) < 0.001
466.11 254 (27) 603 (50) 601 (53) 391 (40) 363 (45) < 0.001
466.19 609 (66) 564 (46) 484 (42) 514 (53) 397 (50)  
Hospital unit
General Ward 900 (97) 1183 (97) 1105 (97) 949 (98) 772 (97) 0.54
PICU 24 (3) 36 (3) 35 (3) 20 (2) 26 (3)  
Length of stay
Total days 4436 6028 5396 4553 3942  
Mean (SD) 4.8 (3.2) 4.9 (2.8) 4.7 (3.2) 4.7 (3.6) 4.9 (3.6) 0.42
  1. ICD-9-CM international classification of disease, 9th revision clinical modification, 466 acute bronchitis and bronchiolitis, 466.11 acute bronchiolitis due to Respiratory Syncytial Virus; 466.19 acute bronchiolitis due to other infectious organism, PICU Pediatric Intensive Care Unit, SD standard deviation
  2. aPercentage is based on annual proportion of bronchiolitis hospitalizations among total hospitalizations per sex
  3. bPercentage is based on annual proportion of bronchiolitis hospitalizations among total hospitalizations per age group in months