. 2007 Nov 6;93(1):40–46. doi: 10.1210/jc.2007-1217

Table 3.

Median (25th, 75th percentiles) PTH by vitamin D status and race/ethnicity (n = 1113), BACH/Bone Survey, 2002–2005

25(OH)D quartiles (ng/ml)	PTH, median (25th, 75th percentiles) (pg/ml)
25(OH)D quartiles (ng/ml)	Black	Hispanic	White
Q1: 25(OH)D ≤ 20.8	30.9 (20.8, 41.6)	28.8 (23.2, 38.0)	31.0 (22.2, 41.0)
Q2: 20.8 < 25(OH)D ≤ 31.3	27.5 (20.5, 42.0)	27.0 (19.8, 43.1)	30.0 (21.5, 37.5)
Q3: 31.3 < 25(OH)D ≤ 42.7	31.0 (20.4, 34.9)	24.8 (19.1, 36.4)	27.0 (19.0, 38.0)
Q4: 25(OH)D > 42.7	22.1 (16.7, 30.4)	23.6 (15.9, 34.0)	24.1 (18.0, 32.1)

Medians and 25th, 75th percentiles were adjusted inversely to the probability of selection. To convert 25(OH)D to nmol/liter, multiply values by 2.496.