. Author manuscript; available in PMC: 2013 Feb 18.

Published in final edited form as: JAMA. 2011 Jul 27;306(4):394–401. doi: 10.1001/jama.2011.1025

Table 2.

Description of Chronic Conditions at 8 and 14 Years of Age

	ELBW NBW No (%) [95% CI]				ELBW VS NBW Odds Ratio (95% CI)^#		Significant Predictors Odds Ratio (95% CI)^#
Age of child	8 yrs	14 yrs	8 yrs	14 yrs	8 yrs	14 yrs
	(n =181)		(n =115)
Chronic Conditions	136 (75) [68,81]	134 (74) [67,80]	43 (37) [29,47]	54 (47) [38,56]	4.3(2.6,7.3)^a	2.8(1.7,4.6)^a	Neuro: 25.8(3.4,195.0)^a; SES: 0.7(0.5,0.9)^a
Functional Limitations	101(56) [48,63]	84(46) [39,54]^a	17(15) [9,23]	18(16) [10,24]	6.0(3.3,11.0)^a	4.2(2.2,7.9)^a	Male: 1.9(1.2,2.9)^a; Neuro: 10.2(4.3,23.9)^a SES: 0.6(0.5,0.8)^a
Compensatory Dependencies	79(44) [36,51]	87(48) [41,56]	25(22) [15,30]	39(34) [25,43]^a	2.6(1.5,4.5)^a	1.7(1.0,2.8)^a
Service Needs or Use	113(62) [55,70]	104(58) [50,65]	24(21) [14,29]	28(24) [17,33]	5.2(2.9,9.0)^a	3.4(1.9,5.8)^a	Neuro: 26.5(6.4,110.1)^a; SES: 0.7(0.5,0.9)^a
Asthma
Ever diagnosed	67(37) [30,45]	71(39) [32,47]	17(15) [9,23]	24(21) [14,29]^a	3.6(2.0,6.7)^a	2.7(1.5,4.7)^a	Male: 1.9(1.2,3.0)^a
Asthma medication⁺, ⁰	43(24) [18,31]	41(23) [17,29]	9(8) [4,14]	19(17) [10,25]^a	3.7(1.7,8.1)^a	1.5(0.8,2.8)
Obesity	n=146	n=146	n=113	n=113
BMI z-score (95% CI)^†	0.06 (−0.15,0.27)	0.38^a (0.20,0.56)	0.43 (0.21,0.64)	0.56 (0.35,0.78)	β-0.4(−0.7,−0.1)^a	β-0.2(−0.5, 0.1)
BMI ≥ 95^th percentile	17(12) [7,18]	28(19) [13,27]^a	18(16) [10,24]	23(20) [13,29]	1.4(0.7, 2.9)	1.1(0.6,2.0)

ELBW – Extremely low birth weight, NBW – Normal birth weight CI – Confidence Interval

Obtained from a generalized estimation equations logistic regression model simultaneously analyzing data from ELBW and NBW children at both time points (8 and 14 years) adjusting for socioeconomic status (SES), race, sex. Adjusted also for neurosensory impairment In analyses concerning chronic conditions

p<0.05,

⁰

Interaction age by study group, p=0.004

⁺

Asthma medication received during last 12 months

^†

Results are β=estimated difference in mean BMI z-score obtained for ELBW – NBW obtained from a mixed model analysis, adjusting for SES, race and sex.