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Table 2 Determinants of Smoking cessation, Smoking intensity and Age of smoking initiation in crude and adjusted variables

From: Pattern of cigarette smoking: intensity, cessation, and age of beginning: evidence from a cohort study in West of Iran

Variable

Smoking cessation

Smoking intensity

Age of smoking initiation

Crude OR

(95%CI)

Adjusted OR (95%CI)

Crude IRR

(95%CI)

Adjusted IRR (95%CI)

Crude coefficient

(95%CI)

Adjusted coefficient (95%CI)

Gender

Male

1

1

1

1

1

1

Female

2.56 (1.97_3.32)

2.03 (1.47_2.80)

0.54 (0.52_0.56)

0.49 (0.47_0.52)

5.57 (4.53_6.62)

4.08 (2.94_5.22)

Age group

35_45

1

1

1

1

1

 

46_55

1.77 (1.41_2.22)

1.83 (1.44_2.33)

1.14 (1.11_1.18)

1.09 (1.06_1.12)

−0.5(−1.41_0.37)

 

56_65

3.36 (2.66_4.26)

3.58 (2.71_4.72)

1.06 (1.03_1.09)

1.10 (1.06_1.13)

2.17 (1.23_3.11)

 

Marital status

Married

1

 

1

1

1

 

Single

0.26 (0.10_0.68)

 

0.77 (0.70_0.85)

0.87 (0.78_0.96)

0.68(−2.32_3.69)-

 

Divorced/widow/widower

1.54 (0.87_2.44)

 

0.81 (0.76_0.86)

1.35 (1.26_1.46)

3.86 (1.88_5.83)

 

Education

Illiterate

1

1

1

1

1

1

≤ 5 years

0.75 (0.59_0.95)

1.30 (0.59_0.95)

1.11 (1.08_1.14)

0.94 (0.91_0.98)

−2.96(−3.96_-1.95)

−1.59(− 2.64_-0.54)

6_9 years

0.48 (0.37_0.63)

1.01 (0.37_0.63)

1.06 (1.03_1.10)

0.89 (10.86_0.93)

−2.70(−3.79_-1.62)

−1.02(− 2.20_-0.14)

10_12 years

0.58 (0.43_0.78)

1.36 (0.43_0.78)

0.89 (0.86_0.93)

0.77 (0.73_0.80)

−2.55(− 3.79_-1.31)

−1.21(− 2.54_-0.11)

High school/ academic

0.84 (0.57_1.25)

2.02 (0.57_1.25)

0.57 (0.53_0.60)

0.50 (0.46_0.53)

−2.23(−3.79_-0.59)

−1.83(− 3.57_-0.83)

Place of resident

Urban

1

 

1

 

1

 

Rural

0.86 (0.71_1.02)

 

1.02 (1.00_1.05)

 

0.75 (0.40_1.54)

 

Income status

Lowest

1

 

1

 

1

 

Lower

0.94 (0.71_1.25)

 

1.14 (1.11_1.19)

 

0.09(−1.09_1.28)

 

Middle

0.92 (0.69_1.23)

 

1.15 (1.11_1.19)

 

−1.21(−2.40_-0.30)

 

Higher

0.86 (0.65_1.15)

 

0.99 (0.95_1.02)

 

−1.32(−2.51_-0.13)

 

Highest

1.02 (0.77_1.36)

 

0.93 (0.89_0.96)

 

−1.60(−2.81_-0.39)

 

BMI

18.4≤

1

1

1

1

1

 

18.5_24.9

2.10 (1.12_3.94)

2.66 (1.39_5.12)

0.80 (0.76_0.85)

0.84 (0.79_0.89)

1.34(−0.82_3.50)

 

25.0–29.9

3.18 (1.71_5.93)

4.16 (2.17_7.95)

0.82 (0.77_0.86)

0.87 (0.82_0.93)

1.52(−0.62_3.67)

 

30.0–34.9

4.48 (2.34_8.58)

5.98 (3.04_11.7)

0.78 (0.73_0.83)

0.85 (0.80_0.91)

1.27(−1.00_3.56)

 

> 35

5.16 (2.38_11.1)

6.50 (2.87_14.6)

0.79 (0.73_0.86)

1.04 (0.95_1.13)

3.56 (0.70_6.42)

 

Childhood SHS

No

1

 

1

1

1

1

Yes

1.14 (0.94_1.38)

 

1.03 (1.09_1.14)

1.12 (1.00_1.26)

1.12 (1.09_1.14)

−0.94(−1.71_-0.18)

Current SHS

No

1

1

1

1

1

 

Yes

0.83 (0.68_1.00)

0.68 (0.52_0.87)

1.10 (1.11_1.17)

1.14 (1.06_1.41)

−0.38(−1.19_0.42)

 

Smoking intensity

Light smokers

1

1

–

–

1

1

Medium smokers

0.65 (0.50_0.84)

0.68 (0.51_0.91)

−3.54(−4.62_-2.45)

−2.91(−3.99_-1.84)

Heavy smokers

0.55 (0.45_0.68)

0.57 (0.54_0.71)

−4.82(−5.64_ − 4.01)

-4.01(−4.85_-3.16)

Age of smoking initiation

18≥

1

1

1

1

–

–

> 19

0.75 (0.58_0.86)

0.71 (0.58_0.86)

0.71 (0.70_0.73)

0.71 (0.70_0.73)