Table 11 Meta-analyses for amount smoked^a

Number of sets^c

42

57

11

About 5 cigs/day^{d, g}

N

40

53

9

F

2.58 (2.39-2.78)

2.04 (1.91-2.16)

2.21 (1.88-2.59)

R

2.89 (2.41-3.45)

2.32 (2.07-2.60)

4.24 (1.88-9.55)

H, P_H

3.58, < 0.001

2.08, < 0.001

7.82, < 0.001

About 20 cigs/day^{e, g}

N

23

33

6

F

6.24 (5.79-6.73)

3.64 (3.33-3.98)

7.10 (4.83-10.44)

R

6.21 (4.72-8.17)

4.43 (3.68-5.32)

5.07 (2.04-12.61)

H, P_H

7.83, < 0.001

3.32, < 0.001

3.56, < 0.01

About 45 cigs/day^{f, g}

N

26

35

6

F

9.83 (8.85-10.92)

6.00 (5.48-6.57)

12.39 (7.49-20.50)

R

9.50 (7.38-12.22)

7.37 (5.86-9.28)

7.19 (2.74-18.87)

H, P_H

3.28, < 0.001

4.66, < 0.001

2.23, < 0.05

Highest v lowest

N

44

62

11

F

2.22 (2.08-2.37)

1.99 (1.87-2.12)

1.41 (1.17-1.70)

R

2.32 (1.90-2.83)

2.42 (2.10-2.79)

2.73 (1.23-6.04)

H, P_H

6.02, < 0.001

3.65, < 0.001

7.50, < 0.001