Table 2.

Accuracy of BMI cut-off value to define obesity in white, black and Hispanic reproductive-aged women based on NIH guideline and the current study

Race/ethnicity	No of subjects					Sensitivity (95% CI)	Specificity (95% CI)	Overall performance*
	TP	FP	FN	TN	Total
NIH†
White	53	0	58	78	189	47.8 (38.7–57.0)	100.0 (95.3 – 100.0)	147.8
Black	72	2	24	61	159	75.0 (65.5 – 82.6)	96.8 (89.1 – 99.1)	171.8
Hispanic	77	1	66	63	207	53.9 (45.7 – 61.8)	98.4 (91.7 – 99.7)	152.3
Overall	202	3	148	202	555	57.7 (52.5 – 62.8)	98.5 (95.8 – 99.5)	156.2
Rahman et al.‡
Whte	95	5	16	73	189	85.6 (77.9 – 90.1)	93.6 (85.9 – 97.2)	179.2
Black	78	6	18	57	159	81.3 (72.3 – 87.8)	90.5 (80.7 – 95.6)	171.8
Hispanic	119	8	24	56	207	83.2 (76.2 – 88.5)	87.5 (77.2 – 93.5)	170.7
Overall	292	19	58	186	555	83.4 (79.1 – 87.0)	90.7 (86.0 – 94.0)	174.1

^*Overall performance equals summation of sensitivity and specificity

BMI = body mass index; TP = true positive; FP = false positive; FN = false negative; TN = true negative;

^†BMI cutoff value to define obesity ≥ 30 kg/m²

Actual obesity is defined as %BF > 35%

^‡According to obesity definition derived from the current study: white ≥ 25.5 kg/m², black ≥ 28.7 kg/m², Hispanic ≥ 26.2 kg/m²