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Table 3 Unadjusted and adjusted odds ratios for the risk of exceeding the upper limit of the sodium ion level (4 mmol/L) according to the protein and albumin levels [1517]

From: Comparison of sodium ion levels between an arterial blood gas analyzer and an autoanalyzer in preterm infants admitted to the neonatal intensive care unit: a retrospective study

Variable

Cases (N = 1041)

Unadjusted

Adjusted

OR

95 % CI

P value

OR

95 % CI

P value

Gestational age (wk)

  < 34

700

0.914

0.705–1.185

0.498

0.821

0.607–1.112

0.203

  ≥ 34

341

1.000

(Reference)

1.000

(Reference)

Birth weight (g)

  < 1500

442

1.071

0.837–1.370

0.585

1.112

0.823–1.503

0.490

  ≥ 1500

599

1.000

(Reference)

1.000

(Reference)

Protein (g/dL)

  < 4.3

147

2.565

1.779–3.698

<0.001

2.870

1.920–4.290

<0.001

  ≥ 4.3

894

1.000

(Reference)

1.000

(Reference)

Albumin (g/dL)

  < 2.2

1024

0.981

0.435–2.210

0.963

0.472

0.197–1.130

0.920

  ≥ 2.2

17

1.000

(Reference)

1.000

(Reference)

Sampling day (d)

  ≤ 7

708

1.360

1.045–1.769

0.022

1.326

0.990–1.775

0.058

  > 7

333

1.000

(Reference)

 

1.000

(Reference)

 
  1. OR odds ratio, 95 % CI 95 % confidence interval