Table 4 Distribution of OHIP dimensions with study participant’s characteristics

Age

7–12

1.33 (IQR 0.5)

1.00 (IQR 0.3)

1.00 (IQR 0.5)

1.14 (IQR 0.4)

13–18

1.17 (IQR 0.5)

1.00 (IQR 0.5)

1.00 (IQR 0.3)

1.14 (IQR 0.4)

> 18

1.17 (IQR 0.5)

1.50 (IQR 0.8)

1.00 (IQR 0.3)

1.21 (IQR 0.4)

p-value ^#

0.601

< 0.001

0.451

0.207

Location of the participants

Gondar

1.17 (IQR 0.7)

1.25(IQR 0.8)

1.00 (IQR 0.4)

1.21 (IQR 0.6)

Bahir Dar

1.00 (IQR 0.3)

1.00 (IQR 0.0)

1.00 (IQR 0.0)

1.00 (IQR 0.2)

Debre Markos

1.17 (IQR 0.5)

1.50 (IQR 0.8)

1.00 (IQR 0.3)

1.14 (IQR 0.4)

Dessie

1.50 (IQR 0.7)

1.25 (IQR 1.3)

1.75 (IQR 1.3)

1.50 (IQR 0.5)

p-value ^#

< 0.001

< 0.001

< 0.001

< 0.001

Grade Level

1–4

1.30 (IQR 0.5)

1.00 (IQR 0.5)

1.00 (IQR 0.3)

1.21 (IQR 0.4)

5–8

1.00 (IQR 0.5)

1.25 (IQR 0.8)

1.00 (IQR 0.5)

1.21 (IQR 0.5)

9–12

1.00 (IQR 0.3)

1.25 (IQR 0.8)

1.00 (IQR 0.3)

1.14 (IQR 0.4)

p-value ^#

0.0019

0.414

0.414

0.357

Religion

Orthodox

1.00 (IQR 0.5)

1.00 (IQR 0.5)

1.00 (IQR 0.0)

1.14 (IQR 0.2)

Catholic

1.33 (IQR 0.8)

1.25 (IQR 0.5)

1.00 (IQR 0.5)

1.21 (IQR 0.4)

Muslim

1.50 (IQR 0.8)

1.25 (IQR 0.8)

1.25 (IQR 1.0)

1.36 (IQR 0.6)

Protestant

1.33 (IQR 0.5)

1.75 (IQR 0.8)

1.00 (IQR 0.3)

1.21 (IQR 0.2)

p-value^#

< 0.001

0.001

< 0.001

< 0.001

Disability types

Visual impaired

1.00 (IQR 0.3)

1.25 (IQR 0.8)

1.00 (IQR 0.3)

1.14 (IQR 0.4)

Hearing impaired

1.33 (IQR 0.7)

1.00 (IQR 0.5)

1.00 (IQR 0.8)

1.21 (IQR 0.6)

Mental problem

1.33 (IQR 0.5)

1.00 (IQR 0.3)

1.00 (IQR 0.0)

1.14 (IQR 0.2)

Others

1.16 (IQR 1.0)

1.50 (IQR 0.8)

1.00 (IQR 0.5)

1.29 (IQR 0.7)

p-value ^#

< 0.001

< 0.001

< 0.001

0.027

Frequency of tooth brushing

Never

1.17 (IQR 0.3)

1.00 (IQR 0.3)

1.00 (IQR 0.0)

1.07 (IQR 0.2)

Sometimes

1.17 (IQR 0.5)

1.25 (IQR 0.8)

1.00 (IQR 0.3)

1.21 (IQR 0.4)

Once a day

1.33 (IQR 0.7)

1.00 (IQR 0.5)

1.00 (IQR 0.8)

1.21 (IQR 0.6)

Twice a day

1.00 (IQR 0.5)

1.25 (IQR 0.5)

1.00 (IQR 0.3)

1.14 (IQR 0.4)

p-value ^#

0.0083

0.0012

0.0023

< 0.001

Oral hygiene status

Good

1.33 (IQR 0.7)

1.00 (IQR 0.5)

1.00 (IQR 0.8)

1.21 (IQR 0.6)

Fair

1.17 (IQR 0.5)

1.00 (IQR 0.5)

1.00 (IQR 0.3)

1.14 (IQR 0.4)

Poor

1.17 (IQR 0.5)

1.00 (IQR 0.5)

1.00 (IQR 0.3)

1.14 (IQR 0.4)

p-value ^#

0.134

0.0237

0.0043

0.222

Sex

Male

1.17 (IQR 0.5)

1.00 (IQR 0.5)

1.00 (IQR 0.3)

1.14 (IQR 0.4)

Female

1.17 (IQR 0.5)

1.00 (IQR 0.5)

1.00 (IQR 0.3)

1.14 (IQR 0.4)

p-value ^&

0.854

0.305

0.329

0.870

Self-reported dental health problem

No

1.50 (IQR 0.7)

1.25 (IQR 0.8)

1.00 (IQR 0.5)

1.29 (IQR 0.5)

Yes

1.50 (IQR 0.7)

1.25 (IQR 0.8)

1.25 (IQR 0.8)

1.43 (IQR 0.5)

p-value^&

0.241

0.401

0.273

0.243

Dental caries

Yes

1.33 (IQR 0.7)

1.25 (IQR 0.8)

1.00 (IQR 0.5)

1.14 (IQR 0.2)

No

1.00 (IQR 0.5)

1.00 (IQR 0.5)

1.00 (IQR 0.0)

1.21 (IQR 0.5)

p-value^&

0.641

0.401

0.273

0.243