TABLE 5

Comparison of characteristics between infants who presented with apnea alone, apnea and upper respiratory tract infection (URI), apnea and bronchiolitis and bronchiolitis alone who subsequently developed apnea in the hospital.

VariableApnea Only (26)Apnea and URI (13)Apnea and Bronchiolitis (57)Bronchiolitis Only (894)P
Subsequent apnea5324941
Febrile defined as triage temperature ≥38°C0 (0)0 (0)2 (8)2 (22).49
Boys5 (100)2 (67)15 (63)4 (44).24
Previous history of apnea0 (0)1 (33)5 (21)2 (22).69
Age, mo, median (p25, p75)0.7 (0.13,1.8)0.5 (0.5, 2.0)1.0 (0.5, 2.2)1.2 (0.6, 2.0).89
Age
 <1 mo3 (60)2 (67)11 (46)4 (44).89
 <6 wk3 (60)2 (67)15 (63)6 (67).99
 <2 mo4 (80)2 (67)16 (67)6 (67).99
Born premature3 (60)3 (100)13 (54)3 (33).29
Weight, mean (SD)3.7 (1.1)2.6 (0.4)3.7 (0.9)4.2 (1.3).16
Weight, kg
 <5 4 (100)3 (100)22 (96)7 (78).45
 <4 2 (50)3 (100)17 (74)4 (44).21
 <3.52 (50)3 (100)12 (52)3 (33).35
Birth weight, mean (SD)2.4 (1.7)2.0 (0.6)2.6 (0.9)2.9 (1.0).61
Birth weight, kg
 <1.5 2 (40)1 (33)2 (8)1 (11).15
 <2.0 2 (40)2 (67)6 (25)2 (22).45
 <2.5 2 (40)2 (67)9 (38)3 (33).87
Duration median days (p25, p75)0.5 (0.5,0.5)1.0 (0.5,3)3 (0.5,4)2 (2,4).04
Duration, d
 ≤1 5 (100)2 (67)8 (36)1 (11)<.01
 ≤2 5 (100)2 (67)10 (45)6 (67).12
 ≤3 5 (100)3 (100)16 (73)6 (67).47
  • Values are n (%) unless otherwise indicated. Weight was not recorded in all patients including 2 patients who subsequently had apnea in the hospital.