Table 3.
Characteristics of all reported infants without underlying disorders, invasively infected with Cronobacter, by time period.
| Characteristica | 1958–2003 | 2004–2010 | Total | P valueb |
|---|---|---|---|---|
| Premature | 48/63 (76%) | 12/29 (41%) | 60/92 (65%) | |
| Full term | 15/63 (24%) | 17/29 (59%) | 32/92 (35%) | P = 0.002 |
| BW <2500 g | 44/55 (80%) | 10/24 (42%) | 54/79 (68%) | |
| BW ≥ 2500 g | 11/55 (20%) | 14/24 (58%) | 25/79 (32%) | P = 0.001 |
| Place of symptom onset: | ||||
| Hospital | 48/61 (79%) | 14/29 (48%)c | 62/90 (69%) | |
| Home | 13/61 (21%) | 15/29 (52%) | 28/90 (31%) | P = 0.007 |
aAn infant was considered full term if the records indicated that was the case and/or the gestational age was specified as being at least 37 weeks. An infant was considered premature if the records indicated that was the case and/or the gestational age was less than 37 weeks. BW, birthweight. Table excludes patients for whom the specified data are unknown; there were a total of 68 infants in 1958–2003 and 30 in 2004–2010.
bFisher’s exact tests and Freeman-Halton extension of the Fisher’s exact probability test for a 2 × 3 table. Not significant (NS) if P ≥ 0.05. Totals percents may not equal 100 due to rounding.
cThis category includes one infant who became ill 12 h after leaving the hospital and another who was noted to be ill on the day of hospital discharge and was reportedly symptomatic while in the hospital.