Table 3. Comparison of 24-H Abpms Between the ELBW Group and Controls.

	7th Year of Life			11th Year of Life
	Study Group	Control Group	P Value	Study Group	Control Group	P Value
MAP 24 h (mmHg)	79 ± 6	77 ± 5	0.12	82 ± 4	82 ± 5	0.89
MAP day (mmHg)	83 ± 6	82 ± 5	0.46	84 ± 5	83 ± 5	0.79
MAP night (mmHg)	72 ± 6	70 ± 4	0.23	72 ± 4	73 ± 6	0.62
SBP 24 h (mmHg)	104 ± 7	103 ± 6	0.5	109 ± 7	108 ± 8	0.84
SBP day (mmHg)	106 ± 7	106 ± 6	0.97	111 ± 7	110 ± 8	0.77
SBP night (mmHg)	100 ± 7	98 ± 6	0.26	99 ± 7	99 ± 8	0.9
DBP 24 h (mmHg)	65 ± 5	64 ± 5	0.56	67 ± 4	67 ± 5	0.69
DBP day (mmHg)	68 ± 5	69 ± 5	0.66	69 ± 5	69 ± 5	0.94
DBP night (mmHg)	60 ± 5	59 ± 5	0.53	55 ± 5	57 ± 6	0.4
MAP 24 h (z-score)	0.5 ± 1.1	-0.3 ± 0.78	< 0.01	0.26 ± 0.6	0.19 ± 0.7	0.61
MAP day (z-score)	-0.36 ± 0.9	-0.7 ± 0.73	0.05	-0.01 ± 0.78	-0.34 ± 0.73	0.04
MAP night (z-score)	1.15 ± 0.84	0.2 ± 0.72	0.02	0.58 ± 0.71	0.23 ± 0.91	0.0508
SBP 24 h (z-score)	-0.13 ± 1.14	-0.45 ± 0.86	0.15	-0.08 ± 1.02	-0.31 ± 1.2	0.34
DBP 24 h (z-score)	-0.08 ± 1.07	-0.4 ± 0.96	0.14	0.06 ± 0.82	0.01 ± 0.89	0.78
Nocturnal MAP dipping (%)	15.9 ± 17.4	14.8 ± 5	0.28	13.8 ± 6	13.4 ± 4	0.74

Abbreviations: ABPM, ambulatory blood pressure measurement; DBP, diastolic blood pressure; ELBW, extremely low birth weight; MAP, mean arterial pressure; SBP, systolic blood pressure.