Table 1 Univariable and multivariable analysis of association of studied variables with body mass index for age z-score (BAZ) in the primary school students (n = 9853).

From: Overweight and obesity and its determinants in primary school students: a population-based study from Iran

Statistics

Univariable Analysis

B

Multivariable Analysis

BMI for age z-score (BAZ)

P value

Odds ratio (95%CI)

P value

Odds ratio (95%CI)

overweight/obese/severe obese

Others

Variables

N or Mean

% or SD

N or Mean

% or SD

Gender

Male

1233

25.2

3656

74.8

0.004

1.1 (1–1.2)

− 0.06

0.1

0.9 (0.8–1)

Female

1379

27.8

3585

72.2

Height for age-z score (HAZ): Normal/Stunting(ref)

Normal

2596

27

7025

73

 < 0.001

5 (3.3–10)

1.5

 < 0.001

4.5 (2.8–7.2)

Moderate to severe stunning

20

8.3

221

91.7

Residency Place: Urban/Rural(ref)

Urban

2065

30.3

4740

69.7

 < 0.001

2 (2–2.5)

0.5

 < 0.001

1.7 (1.5–1.9)

Rural

547

17.9

2501

82.1

Type of school: Private/Public(ref)

Public

1641

23

5504

77

 < 0.001

1.8 (1.7–2)

0.5

 < 0.001

1.6 (1.6–2)

Private

975

35.9

1742

64.1

Grade in School

1

358

18.5

1577

81.5

 < 0.001

0.09

0.2

1.09 (0.9–1.2)

2

417

22.1

1469

77.9

3

402

27

1088

73

4

484

31.4

1056

68.6

5

504

32.9

1029

67.1

6

442

30.6

1004

69.4

Age (year)

9.3

1.7

8.9

1.8

 < 0.001

0.1

0.01

1.01 (1–1.01)