TABLE 1

Demographic and Clinical Characteristics of the Study Population

VariablesNetworks
Canada, N = 802United States, N = 978Australia and
New Zealand, N = 805United Kingdom and
Ireland, N = 841Spain and Portugal, N = 299
Agea (mo)4.4 ± 3.14.5 ± 2.84.9 ± 3.14.3 ± 2.93.8 ± 2.9
Gender, N (% male)496 (62)577 (59)503 (62)514 (61)184 (61)
Duration of distressa (d)3.6 ± 2.93.1 ± 3.42.3 ± 1.92.6 ± 2.12.5 ± 2.6
History of poor feeding N (%)455 (57)455 (46)451 (56)475 (56)114 (38)
Temperaturea (°C)37.4 ± 0.837.5 ± 0.937.0 ± 0.937.0 ± 0.837.4 ± 0.9
Respiratory ratea (bpm)49 ± 14.851.5 ± 16.550.4 ± 12.947.6 ± 11.653.1 ± 11.1
Oxygen saturationa (%)96.2 ± 4.896.4 ± 3.997.1 ± 2.097.0 ± 3.697.1 ± 2.3
Reported and observed apnea, N (%)80 (10)81 (8)83 (10)53 (6)13 (4)
Dehydration, N (%)87 (11)107 (11)145 (18)49 (6)7 (3)
Nasal flaring and/or grunting, N (%)142 (18)219 (22)150 (19)61 (7)21 (7)
Chest retractions, N (%)538 (67)734 (75)679 (84)538 (64)207 (69)
  • Differences between networks were significant for all variables (P < .001). bpm, breaths per minute.

  • a Mean ± SD.