Measurements of Liveborn Caucasian Infants at Sea Level: Crown-Heel Length

Description

The crown-heel length in Caucasian infants born at 25-44 weeks gestation after last menstrual period were measured and the distribution determined.

weeks gestation	mean-2 S.D.	mean	mean+2 S.D.
25	31.6	34.6	37.6
26	32.6	35.6	38.6
27	33.5	36.6	39.7
28	34.5	37.6	40.7
29	35.6	38.8	42
30	36.6	39.9	43.2
31	37.8	41.1	44.4
32	39	42.4	45.8
33	40.3	43.7	47.1
34	41.5	45	48.5
35	42.7	46.2	49.7
36	43.8	47.4	51
37	45	48.6	52.2
38	46.1	49.8	53.5
39	47	50.7	54.4
40	47.4	51.2	55
41	47.9	51.7	55.5
42	47.7	51.5	55.3
43	47.5	51.3	55.1
44	47.2	51	54.8

Approximating Equations (JMP)

mean - 2SD =

= (0.0000164 * ((week gestation)^5)) - (0.002992 * ((week gestation)^4)) + (0.211049 * ((week gestation)^3)) - (7.237371 * ((week gestation)^2)) + (122.13336 * (week gestation)) -787.7081

mean =

= (0.0000139 * ((week gestation)^5)) - (0.002566 * ((week gestation)^4)) + (0.1822967 * ((week gestation)^3)) - (6.273504 * ((week gestation)^2)) + (106.14948 * (week gestation)) -680.1993

mean + 2SD =

= (0.0000114 * ((week gestation)^5)) - (0.00214 * ((week gestation)^4)) + (0.15354444 * ((week gestation)^3)) - (5.309638 * ((week gestation)^2)) + (90.165591 * (week gestation)) -572.6905

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Description

Specialty

ICD-10