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. Author manuscript; available in PMC: 2013 May 1.
Published in final edited form as: J Adolesc Health. 2009 Aug 18;46(3):245–250. doi: 10.1016/j.jadohealth.2009.06.023

Table B.

Correlation of BMI to partitioned BMI, at ages 9 and 18, by BMI group at ages 9 and 18 (Pearson R)

Ratio of BMI@9 to BMI@18
(95% confidence interval)		 Ratio of BMI to FMI
(95% confidence interval)		 Ratio of BMI to FFMI
(95% confidence interval)		 Ratio of FMI to FFMI
(95% confidence interval)
Low BMI group (mean BMI 14.6), at age 9 N/A 0.440
(.328, .539)		 0.795
(.741, .838)		 0.261
(.129, .373)
Mid BMI group (mean BMI 17.9), at age 9 N/A 0.822
(.796, .844)		 0.677
(.634, .715)		 0.692
(.651, .729)
High BMI group (mean BMI 24.6), at age 9 N/A 0.864
(.826, .893)		 0.502
(.397, .593)		 0.668
(.589, .734)
Low BMI group (mean BMI 20.4), at age 18 0.206
(.069, .333)		 0.188
(.050, .318)		 0.130
(−.009, .263)		 0.169
(.031, .300)
Mid BMI group (mean BMI 24.6), at age 18 0.515
(.454, .572)		 0.460
(.419, .625)		 0.350
(.277, .419)		 0.406
(.336, .471)
High BMI group (mean BMI 33.8), at age 18 0.581
(.479, .665)		 0.531
(.419, .625)		 0.030
(−.112, .171)		 0.311
(.176, .433)

BMI@9 = BMI at age 9 years; BMI@18 = BMI at age 18 years; FFMI = fat-free mass index; FMI = fat mass index