Table 4 Adjusted odds ratio* for low BMI (<18.5)by frequency of tobacco use (Non tobacco users with normal BMI 18.5–25.0 were referent category)

Never users

1.0

1.0

Smoking

1–5

1.31 (1.17 to 1.45)

1.50 (1.01 to 2.21)

6–10

1.81 (1.62 to 2.01)

2.02 (1.04 to 3.90)

≥ 11

2.11 (1.93 to 2.30)

2.20 (1.28 to 3.79)

Smokeless

1–2

1.25 (1.13 to 1.38)

1.46 (1.38 to 1.55)

3–5

1.39 (1.28 to 1.52)

1.59 (1.50 to 1.69)

6–10

1.25 (1.14 to 1.38)

1.72 (1.58 to 1.88)

≥ 11

1.40 (1.20 to 1.62)

2.08 (1.77 to 2.45)