Body weight at 1.5- and 3-year health checks and body fat at 14 years of age: a population-based retrospective cohort study using dual-energy X-ray absorptiometry

Kouda, Katsuyasu; Fujita, Yuki; Ohara, Kumiko; Nakamura, Harunobu; Dorjravdan, Munkhjargal; Nakama, Chikako; Nishiyama, Toshimasa; Iki, Masayuki

doi:10.1186/s40101-022-00293-1

Table 3 BMI cutoff points at 1.5 and 3 years to identify excessive FM at 14 years

From: Body weight at 1.5- and 3-year health checks and body fat at 14 years of age: a population-based retrospective cohort study using dual-energy X-ray absorptiometry

	Girls						Boys
	Cutoff point (kg/m²)	Sensitivity	Specificity	Morbidity prevalence rate	Positive predictive value	Negative predictive value	Cutoff point (kg/m²)	Sensitivity	Specificity	Morbidity prevalence rate	Positive predictive value	Negative predictive value
BMI at 1.5 yrs
^aClosest to upper left-hand corner (0, 1)
BMI at 14 yrs > overweight cutoff ^b	16.7	0.72	0.79	0.08	0.23	0.97	16.4	0.74	0.58	0.13	0.21	0.94
WtHR at 14 yrs > 0.5	16.1	0.77	0.59	0.10	0.17	0.96	16.4	0.61	0.56	0.09	0.11	0.94
FMI at 14 yrs > 95th percentile	16.7	0.70	0.77	0.05	0.14	0.98	16.5	0.60	0.58	0.05	0.07	0.97
FMI at 14 yrs > 90th percentile	16.3	0.71	0.69	0.10	0.20	0.96	16.5	0.71	0.61	0.10	0.17	0.95
FMI at 14 yrs > 85th percentile	16.1	0.69	0.60	0.15	0.23	0.92	16.4	0.75	0.59	0.15	0.25	0.93
^cYouden index
BMI at 14 yrs > overweight cutoff ^b	16.1	0.89	0.62	0.08	0.17	0.98	16.4	0.74	0.58	0.13	0.21	0.94
WtHR at 14 yrs > 0.5	16.1	0.77	0.59	0.10	0.17	0.96	15.9	0.83	0.39	0.09	0.11	0.96
FMI at 14 yrs > 95th percentile	16.7	0.70	0.77	0.05	0.14	0.98	17.8	0.40	0.88	0.05	0.15	0.97
FMI at 14 yrs > 90th percentile	16.3	0.71	0.69	0.10	0.20	0.96	16.4	0.76	0.58	0.10	0.17	0.96
FMI at 14 yrs > 85th percentile	15.9	0.75	0.54	0.15	0.22	0.92	16.4	0.75	0.59	0.15	0.25	0.93
BMI at 3 yrs
^aClosest to upper left-hand corner (0, 1)
BMI at 14 yrs > overweight cutoff ^b	16.1	0.78	0.74	0.08	0.21	0.97	16.4	0.63	0.73	0.13	0.25	0.93
WtHR at 14 yrs > 0.5	16.1	0.64	0.74	0.10	0.21	0.95	16.4	0.61	0.71	0.09	0.16	0.95
FMI at 14 yrs > 95th percentile	16.6	0.70	0.84	0.05	0.19	0.98	16.4	0.70	0.70	0.05	0.11	0.98
FMI at 14 yrs > 90th percentile	16.1	0.67	0.74	0.10	0.22	0.95	16.4	0.57	0.71	0.10	0.18	0.94
FMI at 14 yrs > 85th percentile	16.1	0.63	0.71	0.15	0.27	0.91	16.0	0.72	0.63	0.15	0.26	0.93
^cYouden index
BMI at 14 yrs > overweight cutoff ^b	16.1	0.78	0.74	0.08	0.21	0.97	17.5	0.44	0.94	0.13	0.50	0.92
WtHR at 14 yrs > 0.5	16.7	0.50	0.89	0.10	0.32	0.94	17.5	0.44	0.92	0.09	0.33	0.95
FMI at 14 yrs > 95th percentile	16.6	0.70	0.84	0.05	0.19	0.98	17.5	0.50	0.92	0.05	0.24	0.97
FMI at 14 yrs > 90th percentile	16.5	0.57	0.84	0.10	0.28	0.95	15.5	0.95	0.39	0.10	0.15	0.99
FMI at 14 yrs > 85th percentile	16.1	0.59	0.75	0.15	0.29	0.91	15.6	0.94	0.46	0.15	0.23	0.98

BMI, body mass index; FM, fat mass; yrs, years of age; WtHR, waist-to-height ratio; FMI, fat mass index
^aThe point on the curve closest to the upper left-hand corner (0, 1)
^bDetermined using age- and sex-specific BMI cutoff points
^cThe point corresponding to the maximum Youden index

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