Skip to main content

Table 4 Estimates from the multiple regression models and magnitude of influential variables in the multivariable models

From: Cord blood calcium, phosphate, magnesium, and alkaline phosphatase gestational age-specific reference intervals for preterm infants

Analyte

Variable

Coefficient

Standard Error

p - value

% mean

% SD

Phosphate

(mg/dl)

Gestational Age (weeks)

-0.057

0.01

< 0.001

 

Twin

-0.10

0.09

0.28

-1.6

-11.3

 

Triplet

-0.51

0.15

0.001

-8.3

-57.6

 

PIH

-0.29

0.11

0.009

-4.7

-32.7

 

Intercept

8.07

0.33

< 0.001

Calcium

Gestational Age (weeks)

0.054

0.01

< 0.001

(mg/dl)

Twin

-0.23

0.01

0.023

-2.2

-22.8

 

Triplet

-0.40

0.17

0.017

-3.9

-39.6

 

SGA

-0.33

0.13

0.012

-3.2

-32.7

 

PIH

-0.38

0.11

0.001

-3.7

-37.6

 

Intercept

8.76

0.36

< 0.001

Albumin

Gestational Age (weeks)

0.023

0.01

0.029

Adjusted

SGA

-0.30

0.11

0.009

-2.7

-32.4

Calcium

PIH

-0.38

0.10

< 0.001

-3.5

-41.1

(mg/dl)

Caesarian delivery

-0.28

0.09

0.001

-2.6

-30.3

 

Intercept

10.41

0.36

< 0.001

Magnesium

Gestational Age (weeks)

-0.007

0.002

0.006

(mg/dl)

Twin

-0.069

0.025

0.006

-3.7

-31.9

 

Triplet

0.023

0.042

0.58

1.2

10.6

 

Intercept

2.1

0.08

< 0.001

Alkaline

Gestational Age (weeks)

-3.69

0.74

< 0.001

Phosphatase

Intercept

299

25

< 0.001

(units/L)