Table 2 Regression analysis of the OHIP-49 items and prevalence of negative impact among subjects

OHIP-49Sp

Functional limitation

Q1: difficulty chewing

*

*

0.54

Q2: trouble pronouncing words

*

0.016

0.35

Q3: noticed tooth that doesn’t look right

*

*

0.48

Q4: appearance affected

*

*

0.42

Q5: breath stale

0.05

*

0.46

Q6: taste worse

*

0.032

0.43

Q7: food catching

*

*

0.75

Q8: digestion worse

0.10

*

0.19

Q9: dentures not fitting

*

*

0.40

Physical pain

Q10: painful aching

*

0.024

0.37

Q11: sore jaw

*

*

0.28

Q12: headaches

*

*

0.08

Q13: sensitive teeth

0.14

*

0.33

Q14: toothache

0.05

*

0.35

Q15: painful gums

*

*

0.47

Q16: uncomfortable to eat

*

0.14

0.59

Q17: sore spots

*

*

0.46

Q18: uncomfortable dentures

*

*

0.39

Psychological discomfort

Q19: worried by dental problems

*

*

0.68

Q20: self-conscious

*

0.057

0.41

Q21: dental problems made you miserable

0.03

*

0.33

Q22: felt uncomfortable about the appearance

0.03

*

0.39

Q23: felt tense

*

0.56

0.36

Physical disability

Q24: speech unclear

0.04

*

0.34

Q25: others misunderstood

0.06

*

0.21

Q26: less flavor in food

*

*

0.43

Q27: unable to brush teeth

*

*

0.25

Q28: avoid eating

*

*

0.47

Q29: diet unsatisfactory

*

0.003

0.22

Q30: unable to eat (dentures)

*

*

0.25

Q31: avoid smiling

*

*

0.33

Q32: interrupt meals

*

0.004

0.30

Psychological disability

Q33: sleep interrupted

0.11

*

0.10

Q34: upset

0.05

*

0.26

Q35: difficult to relax

*

0.087

0.27

Q36: depressed

*

*

0.27

Q37: concentration affected

*

*

0.20

Q38: been embarrassed

*

0.006

0.39

Social disability

Q39: avoid going out

*

*

0.16

Q40: less tolerant of others

0.03

*

0.11

Q41: trouble getting on with others

*

*

0.20

Q42: irritable with others

*

0.002

0.12

Q43: difficulty doing jobs

0.09

0.007

0.11

Handicap

Q44: your general health has worsened

*

*

0.21

Q45: financial loss

*

*

0.15

Q46: unable to enjoy people’s company

*

*

0.20

Q47: life unsatisfying

*

0.011

0.28

Q48: unable to function

0.06

0.001

0.11

Q49: unable to work

0.02

*

0.11