March 2007

Volume 24, Issue 1

Conversion tables for the Corah and Modified Dental Anxiety Scales

Authors: G.M. Humphris H.M.M. Clarke R. Freeman


Dental anxiety assessment can be achieved by using brief multi-item scales. Corah’s Dental Anxiety Scale has been used extensively since the 1970s. However the scale has some flaws which led to the design of the Modified Dental Anxiety Scale incorporating some minor but important improvements. To enable comparison between studies who have adopted one but not both scales a conversion algorithm was required. Objective: To produce regression equations and tables to enable researchers to convert derived scores from one scale to another. Basic research design: Cross-sectional survey. Clinical setting: 18 dental practices in Northern Ireland. Participants: Patients (n=1,028) were invited to participate. Main Outcome measures: Corah and Modified Dental Anxiety Scales Results: Twenty four patients refused (response rate 98%) providing 1,004 patients for analysis. Mean scores for both scales were close to those reported elsewhere. The correlation between the two scales was high (r=0.89). Regression equation and summary tables presented for conversion purposes. Conclusions: More accurate estimates of scale scores can be derived with this procedure than simple prorating. Key words: Conversion tables, Corah, dental anxiety scales, Modified, psychometrics.

£10 single article

Other articles in this issue

Article Pages Access
Editorial - Expanding dental undergraduate clinical outreach programmes into general dental practice. 2-3 £10 single article
Community effectiveness of fissure sealants and the effect of fluoridated water consumption 4-11 £10 single article
Financial systems’ impact on dental care; a review of fee-forservice and capitation systems 12-20 £10 single article
Agreement amongst examiners assessing dental fluorosis from digital photographs using the TF index. 21-25 £10 single article
Frequency and distribution patterns of sealants among 15-year-olds in Denmark in 2003 26-30 £10 single article
Enamel defects and its relation to life course events in primary dentition of Brazilian children: A longitudinal study 31-36 £10 single article
Oral health care and status of elderly care home residents in Glasgow. 37-42 £10 single article
Knowledge of and attitudes toward severe acute respiratory syndrome among a cohort of dental patients in Hong Kong following a major local outbreak 43-48 £10 single article
Conversion tables for the Corah and Modified Dental Anxiety Scales 49-54 £10 single article
An audit of paediatric dental treatments carried out under general anaesthesia in a sample of Spanish patients 55-58 £10 single article
BASCD Survey - The dental caries experience of 5-year-old children in Great Britain (2005/6). Surveys co-ordinated by the British Association for the Study of Community Dentistry. 59-63 £10 single article


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