Association between total bilirubin and bone mineral density level in adolescents

Table 3 Multivariable adjusted associations among quartile of bilirubin and bone mass density

	Total femur BMD	Femur neck BMD	Trochanter BMD	Intertrochanter BMD	Lumbar spine BMD
	β (95% CI) P value	β (95% CI) P value	β (95% CI) P value	β (95% CI) P value	β (95% CI) P value
Bilirubin (Quintile)
Q1	Ref	Ref	Ref	Ref	Ref
Q2	0.010 (-0.003, 0.024) 0.124	0.013 (-0.000, 0.026) 0.057	0.005 (-0.007, 0.018) 0.374	0.014 (-0.001, 0.029) 0.065	0.008 (-0.004, 0.021) 0.188
Q3	0.021 (0.007, 0.034) 0.004	0.018 (0.004, 0.032) 0.009	0.018 (0.005, 0.030) 0.006	0.023 (0.007, 0.039) 0.004	0.015 (0.002, 0.028) 0.026
Q4	0.036 (0.021, 0.050) < 0.001	0.030 (0.016, 0.044) < 0.001	0.033 (0.019, 0.046) < 0.001	0.040 (0.023, 0.056) < 0.001	0.032 (0.018, 0.045) < 0.001
P for trend	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001

Adjust for: age (continuous), sex (male or female), race (non-Hispanic white, black, Mexican American, other Hispanic, other race/ethnicity or missing), education (less than high school, high school, more than high school, or missing), income (less than $ 25,000, $ 25,000–74,999, more than $ 75,000, or missing), body mass index (underweight, normal weight, overweight, obese, or missing), calcium intake, and diabetes (continuous)

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