Table 1 Distribution of 5th and 7th graders according to sociodemographic data, drug use (alcohol, binge drinking, tobacco and marijuana) and allocation group in the cluster randomized controlled trial of the PROERD program, according to baseline. Brazil, 2019 (N = 4,030; 1,727 5th and 2,303 7th graders)

N

%

N

%

N

%

5th grade students (N = 1,727)

(N = 801)

(N = 926)

Gender

Male

882

51.07

432

53.93

450

48.60

Female

845

48.93

369

46.07

476

51.40

Age (mean ± SD)

10.12 ± 0.65

10.10 ± 0.68

10.14 ± 0.61

SES ^a

A

117

9.00

49

7.94

68

9.96

B

447

34.38

224

36.30

223

32.65

C

646

49.69

309

50.08

337

49.34

D-E

90

6.92

35

5.67

55

8.05

Alcohol

Past year Use

161

9.36

81

10.18

80

8.65

Binge drinking

Past year Use

20

1.16

9

1.13

11

1.19

Tobacco

Past year Use

12

0.70

6

0.75

6

0.65

Marijuana

Past year Use

4

0.23

1

0.13

3

0.33

7th grade students (N = 2,303)

(N = 1,200)

(N = 1,103)

Gender

Male

1,187

51.54

621

51.75

566

51.31

Female

1,116

48.46

579

48.25

537

48.69

Age (mean ± SD)

12.28 ± 0.72

12.28 ± 0.74

12.27 ± 0.71

SES ^a

A

130

5.71

74

6.25

56

5.12

B

773

33.93

416

35.14

357

32.63

C

1,222

53.64

629

53.13

593

54.20

D-E

153

6.72

65

5.49

88

8.04

Alcohol

Past year Use

442

19.26

234

19.57

208

18.93

Binge drinking

Past year Use

132

5.77

71

5.95

61

5.58

Tobacco

Past year Use

36

1.57

20

1.67

16

1.46

Marijuana

Past year Use

41

1.79

22

1.84

19

1.73

Inhalants

Past year Use

57

2.49

31

2.60

26

2.37

Cocaine

Past year Use

2

0.09

0

-

2

0.18