Table 3.

Associations between age at menarche and lumbar spine BMD excluding individuals who used female hormones (n = 248)

Age at menarche (years)	Beta	SE	P value	95% CI
≤ 12	Reference
13–15	− 0.012	0.016	0.460	(− 0.044, 0.020)
≥ 16	− 0.053	0.018	0.006	(− 0.089, − 0.016)

Age, race, BMI, education level, family PIR, smoking behavior, alcohol consumption, years since menopause, parity, vigorous activities, moderate activities, total calcium, serum phosphorus, arthritis, thyroid disease, liver disease, kidney disease, and diabetes were adjusted for