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. 2010 Dec 9;2010:917428. doi: 10.1155/2010/917428

(b) Serum PTH (pg/mL) according to gestational age and race/ethnicity**

PTH According to Gestational Age and Race/Ethnicity
<32 weeks
(n = 484)		 32–35 weeks
(n = 36)		 36+ weeks
(n = 26)
All participants 18.7 (8.5)
17.4 (4.7–70.8)		 21.5 (9.1)
22.1 (6.6–44.2)		 26.9 (9.6)
27.9 (9.6–45.2)
African-American 19.0 (9.0)
17.3 (5.1–70.8)		 22.0 (10.9)
22.8 (6.6–44.2)		 32.9 (9.8)
33.2 (17.2–45.2)
Caucasian 17.6 (8.8)
15.3 (6.4–38.7)		 20.3 (9.5)
21.7 (10.2–29.1)		 27.8 (—)
27.8 (18.2–37.3)
Hispanic 18.5 (8.0)
17.7 (4.7–40.9)		 22.6 (7.0)
24.2 (7.0–30.8)		 23.1 (7.5)
21.8 (9.6–33.6)
Other 18.5 (6.5)
16.9 (10.7–32.6)		 11.8 (—)
11.8 (7.6–16.0)

**Reported as mean (SD) in row 1 and median (range) in row 2. Blank cells are those that contain no participants. SD was not estimated in cells that contain fewer than 3 observations.