Table 3.

Median (Interquartile Range) for Rates of Change (%/yr) at Various Scanning Sites by Decades as a Function of Age and Sex

Age (yr)	N	Distal radius		Distal tibia		N	Lumbar spine (trabecular)
		Trabecular	Cortical	Trabecular	Cortical
Women
20–29	15	−1.01 (−2.43, −0.16)*	0.16 (−0.05, 0.55)	−0.76 (−1.77, −0.05)†	0.25 (0.05, 0.45)*	9	−1.75 (−2.28, −1.42)†
30–39	33	−0.14 (−0.57, 0.15)†	0.06 (−0.13, 0.27)	−0.52 (−1.01, 0.03)†	−0.02 (−0.18, 0.21)	28	−1.16 (−2.46, −0.03)*
40–49	49	−0.34 (−0.65, 0.00)*	−0.08 (−0.26, 0.06)*	−0.08 (−0.41, 0.26)	0.02 (−0.20, 0.11)	49	−1.60 (−2.14, −1.03)*
50–59	46	−0.99 (−1.35, −0.45)*	−0.42 (−0.80, −0.11)*	−0.11 (−0.50, 0.16)	−0.41 (−0.66, −0.09)*	43	−2.97 (−4.58, −2.00)*
60–69	34	−0.65 (−1.26, −0.40)*	−0.58 (−1.15, −0.22)*	−0.15 (−0.75, 0.13)†	−0.31 (−0.71, −0.21)*	30	−2.50 (−3.44, −1.79)*
70–79	31	−0.37 (−0.81, −0.03)†	−0.25 (−0.66, −0.01)*	−0.30 (−0.71, −0.00)*	−0.32 (−0.58, −0.12)*	30	−2.20 (−3.79, −1.17)*
80+	35	−0.35 (−1.47, 0.15)†	−0.57 (−1.59, −0.18)*	−0.76 (−1.96, −0.08)*	−0.50 (−1.38, −0.04)*	24	−2.64 (−3.98, −1.55)*
Men
20–29	8	0.18 (−0.23, 0.35)	−0.09 (−0.37, 0.21)	−0.02 (−0.26, 0.31)	0.04 (−0.14, 0.18)	6	−0.98 (−2.13, 1.72)
30–39	50	−0.25 (−0.72, −0.05)*	−0.03 (−0.12, 0.12)	−0.68 (−1.48, −0.10)*	−0.05 (−0.23, 0.10)	39	−0.79 (−1.96, 0.31)*
40–49	50	−0.46 (−1.27, −0.23)*	−0.12 (−0.36, 0.01)*	−0.34 (−0.82, −0.12)*	−0.18 (−0.31, 0.02)*	41	−0.89 (−1.95, −0.43)*
50–59	55	−0.38 (−0.84, −0.30)*	−0.22 (−0.40, −0.04)*	−0.25 (−0.49, −0.03)*	−0.17 (−0.39, −0.01)*	50	−1.72 (−2.82, −0.35)*
60–69	46	−0.47 (−0.92, 0.00)*	−0.23 (−0.40, −0.07)*	−0.22 (−0.39, 0.00)*	−0.10 (−0.31, 0.07)*	42	−1.78 (−3.26, −0.75)*
70–79	51	−0.32 (−0.57, −0.04)*	−0.26 (−0.53, −0.00)*	−0.13 (−0.35, 0.03)*	−0.03 (−0.24, 0.14)	47	−1.77 (−3.97, −1.03)*
80+	49	−0.51 (−0.93, −0.19)*	−0.59 (−0.98, −0.35)*	−0.14 (−0.38, 0.00)*	−0.39 (−0.86, −0.02)*	35	−2.46 (−5.35, −1.67)*

N, number of subjects in each sex- and age-specific decade.

For significance of difference from zero: *p < 0.005 and ^†p < 0.05.