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Table 3 Estimated coefficients of the logistic regression model predicting survival of Titanic passengers using the original (left) and the anonymised (right) data

From: A deterministic approach for protecting privacy in sensitive personal data

Coefficient

Original data

Anonymised data

Std. difference

Estimate

Std. Err.

z value

Pr(\(>|z|\))

Estimate

Std. Err.

z value

Pr(\(>|z|\))

Intercept

3.519

0.437

8.054

8.00e–16

3.615

0.454

7.972

1.56e–15

0.220

Pclass (2nd)

− 1.067

0.286

− 3.732

0.0002

− 1.112

0.300

− 3.707

0.0002

0.159

Pclass (3rd)

− 2.283

0.281

− 8.135

4.12e–16

− 2.343

0.300

− 7.822

5.21e–15

0.216

Sex (male)

− 2.628

0.194

− 13.527

< 2e–16

− 2.625

0.194

− 13.508

< 2e–16

0.012

Age

− 0.033

0.008

− 4.437

9.13e–06

− 0.035

0.008

− 4.586

4.53e–06

0.205

Fare

0.001

0.002

0.466

0.641

0.001

0.002

0.217

0.829

0.223

Family (yes)

− 0.091

0.194

− 0.471

0.638

− 0.089

0.197

− 0.452

0.651

0.010