Table 4.

Characteristics of Children With and Without the Child Behavior Checklist-Dysregulation Profile

Postnatal factors		Dysregulation profile		Row
		Yes (%)	No (%)	n
SNAP-II	20–29	22	26	212
	≥ 30	25	22	181
Lowest MAP a	Lowest quartile	25	21	176
Vasopressor b	Given	27	26	218
MAP variabilityc	Highest quartile	25	24	196
Lowest PaO2d	Lowest quartile	17	25	164
Highest PaO2d	Highest quartile	33	22	159
Lowest PCO2d	Lowest quartile	20	23	157
Highest PCO2d	Highest quartile	19	22	151
Lowest pH d	Lowest quartile	19	22	150
PaO2, day 7	Lowest quartile	7	9	72
PaO2, day 14	Lowest quartile	7	6	52
Tracheal colonization	Definite	29	22	189
Early bacteremia, week 1	Definite	3	8	59
Late bacteremia, weeks 2–4	Definite	29	27	225
Mechanical ventilation e	Day 7	55	59	487
Mechanical ventilation e	Day 14	60	56	465
Mechanical ventilation e	Day 21	53	56	453
Mechanical ventilation e	Day 28	38	47	370
Maximum number of infants		73	753	826

Note: MAP = Mean Arterial Pressure; PCO₂ = partial pressure of carbon dioxide; PH = concentration of hydrogen in an aqueous solution; P_aO₂= partial pressure of oxygen; SNAP II = Score for Neonatal Acute Physiology-Version II.

^aLowest MAP recorded in the first 24 hours, in the lowest quartile for gestational age.

^bTreatment for hypotension in the first 24 hours, using any vasopressor (dopamine, dobutamine, epinephrine).

^cLabile blood pressure, defined as the upper quartile of the difference in the lowest and highest MAP.

^dExtreme quartile for gestational age on two of the first three postnatal days.

^eIncludes conventional mechanical ventilation and high-frequency ventilation.