Table 5 Adjusted odds ratio* for three categories of low BMI and frequency of tobacco use(Non-tobacco users with normal BMI 18.5–25.0 were referent category)

Smoking (Men)

Mild thinness (BMI 17.0–18.5)

Moderate thinness (BMI 16.0–17.0)

Severe thinness (BMI<16.0)

1–5

1.21 (1.06 to 1.39)

1.37 (1.13 to 1.68)

1.45 (1.19 to 1.77)

6–10

1.68 (1.46 to 1.93)

1.93 (1.58 to 2.35)

1.97 (1.62 to 2.39)

> = 11

1.86 (1.66 to 2.09)

2.22 (1.88 to 2.62)

2.54 (2.17 to 2.98)

Smokeless (Women)

1–2

1.32 (1.22 to 1.43)

1.50 (1.34 to 1.68)

1.72 (1.55 to 1.90)

3–5

1.46 (1.35 to 1.57)

1.71 (1.53 to 1.91)

1.76 (1.59 to 1.95)

6–10

1.59 (1.42 to 1.78)

1.63 (1.38 to 1.92)

2.05 (1.78 to 2.35)

> = 11

1.84 (1.48 to 2.29)

2.46 (1.87 to 3.24)

2.19 (1.70 to 2.84)