Table 3 Adjusted odds ratios for Helicobacter pylori positivity for various risk factors in final model

Sex

  Female

1.0

  Male

0.217

0.035

1.242

1.015,

1.519

Age

-0.015

0.000

0.986

0.979,

0.992

Education

  High school +

1.0

  No education

0.484

0.003

1.623

1.176,

2.239

  Primary complete

0.511

0.000

1.666

1.333,

2.083

  Secondary complete

0.405

0.013

1.499

1.091,

2.059

Marital status

  Never married

1.0

  Widowed/Divorced

0.425

0.030

1.530

1.042,

2.246

  Currently married

0.554

0.000

1.739

1.378,

2.197

Social security

  Emekli sandigi

1.0

  Private/foreign

-0.532

0.187

0.587

0.266,

1.295

  BAG-KUR

0.009

0.952

1.009

0.757,

1.345

  SSK

0.450

0.001

1.568

1.213,

2.026

  None

0.439

0.002

1.550

1.174,

2.048

  Green Card

0.383

0.077

1.467

0.960,

2.241

Source of drinking water

  Bottled water/demijohn/pet water

1.0

  Piped water (in house/garden/outside)

0.572

0.000

1.772

1.404,

2.236

  Spring/public fountain

0.517

0.002

1.677

1.218,

2.308

  Other (river. rain water etc.)

0.495

0.008

1.640

1.135,

2.371

Smoking

  Never

1.0

  Tried at past. currently non-smoker

0.038

0.750

1.039

0.821,

1.316

  Tried at past. currently occasional smoker

-0.003

0.985

0.997

0.703,

1.413

  Regular smoker

0.350

0.005

1.419

1.113,

1.808

Alcohol

  Regular consumer

1.0

  Tried at past. currently drinking occasionally

0.586

0.028

1.798

1.066,

3.032

  Tried at past. currently non-drinker

0.687

0.012

1.988

1.161,

3.403

  Never

0.692

0.010

1.997

1.182,

3.374

Region

  South

1.0

  West

0.186

0.147

1.204

0.937,

1.549

  North

0.172

0.343

1.188

0.832,

1.696

  Central

0.382

0.007

1.466

1.111,

1.934

  East

0.563

0.001

1.756

1.264,

2.439

Constant

-0.473

0.173

0,623