Table 4 Results of univariate (COR) and multivariate logistic regression of factors associated with idiopathic scoliosis among school children, Gondar, Ethiopia (n = 1905)

Age

  5–10 years

1 ref

-

1

-

  11–16 years

1.14 (0.66, 1.97)

0.64

1.61 (0.84,3.09)

0.15

Gender

  Male

1

-

1

-

  Female

1.28 (0.77, 2.14)

0.34

1.30 (0.77, 2.21)

0.30

Bag/body weight

  0–10 %

1

-

1

-

  11–20 %

1.09 (0.50, 2.41)

0.82

1.02 (0.57, )1.84

0.9

  > 20 %

0.7 (0.31, 1.61)

0.40

1.11 (0.55, 2.23)

0.77

Types of chair used for sitting

  Chair with backrest

1

-

1

-

  Stool

0.37 (0.11, 1.21)

0.10

7.03 (1.52, 32.5)

0.01^*

  Bench with backrest

1.37 (0.62, 1.95)

0.14

4.12 (1.12, 15.14)

0.03^*

  Bench without back rest

1.07 (0.58, 1.95)

0.13

4,56 (1.20, 17.34)

0.02^*

  School grade

  1–4

1.15 (0.68, 1.94)

0.61

1.42 (0.77, 2.65)

0.26

  5–8

1

-

1

-

Mode of transport

  Walking

2.13 (1.21, 3.74)

0.01

1.44 (0.76, 2.70)

0.25

  Motorized

1

-

1

-

Type of school

  Private

1

-

1

-

  Governmental

1.17 (0.67, 2.05)

0.57

1.62 (0.76, 3.46)

0.21

Pain in the spine

  No

1

-

1

-

  Yes

3.67 (2.19, 6.13)

0.001

4.10 (2.42, 6.89)

0.00^*

Way of carrying school supplies

  Backpack

1

-

1

-

  Shoulder strap

1.14 (0.64, 2.02)

0.65

1.02 (0.57, 1.84)

0.9

  In hand

1.22 (0.62, 2.42)

0.56

1.11 (0.55, 2.23)

0.76