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Table 4 Subgroup analysis of daily smoking amount stratified by age at the smoking initiation

From: The effect of depression status change on daily cigarette smoking amount according to sex: an eleven-year follow up study of the Korea Welfare Panel Study

Variables

Daily cigarette smoking amount (DCA)

No → No

No → Yes

Yes → No

Yes → Yes

ß*

 

ß*

S. E

P value

ß*

S. E

P value

ß*

S. E

P value

Male

Age at the smoking initiation (years)

 Under than 19

Ref.

 

0.163

0.395

0.6799

−0.881

0.337

0.0089

− 0.357

0.710

0.6151

 19 or older

Ref.

 

0.166

0.702

0.8132

−0.111

0.519

0.8301

−0.022

0.966

0.9815

Female

Age at the smoking initiation (years)

 Under than 19

Ref.

 

−0.245

0.508

0.6294

0.196

0.664

0.7677

−0.458

0.709

0.5183

 19 or older

Ref.

 

0.756

0.810

0.3503

0.131

0.862

0.8795

−0.107

0.979

0.9126

  1. * Age at the smoking initiation, age, region, marital status, educational level, income level, chronic disease, alcohol consumption, and survey year were adjusted