Table 1 Logistic mixed model regression.

From: The beneficial effect of prophylactic hydrocortisone treatment in extremely preterm infants improves upon adjustment of the baseline characteristics

 

Effect (OR)

Se

95% CI

p value

Center

Overall estimate

63.6%

28.9%

49.8–75.5%

<0.001

0.472

Gestational age

1.504

0.147

1.127–2.006

0.006

–

Birth weight

1.006

0.001

1.004–1.008

<0.001

–

Female sex

2.843

0.244

1.762–4.588

<0.001

–

RSB—moderate

0.389

0.272

0.228–0.664

0.001

–

RSB—severe

0.099

0.381

0.047–0.208

<0.001

–

Multiple pregnancy

0.475

0.245

0.294–0.767

0.002

–

HC treatment

1.820

0.229

1.162–2.852

0.009

–

  1. The dependent variable is BPD-free survival. The first row (overall estimate) provides the estimated proportion of the endpoint for the reference population, and the relative variation of this value across centers. The following rows report the effect of each covariate in the model by its odds ratio (OR), standard error (Se), associated 95% confidence interval (CI) and p values. Last column report the relative error (variation coefficient) of the studied endpoint across categories of each random factor.
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