Efficacy of Various Subject Screening Measures: RESULTS

In: Dental treatment

1 Mar 2010


The mean age of subjects was 24.2 yr (range 18 to 45 yr), and 52.8% were female. Most subjects were white (84.3%, 75/89); 3.4% were African-American (3/89), 2.3% were Hispanic (2/89), and the remaining nine subjects indicated some other racial background.

Mean Scores for Anxiety Measures

The mean score for anxiety before oral surgery (ISAR) was 31.9 (SD = 15.9; range, 5-82). The percentage of subjects that reported being afraid, very afraid, panicked, or terrified before surgery was 38.2 (34/89).

The mean STAI-S score was 46.1 (SD = 12.5; range, 20-69). The mean STAI-T score was 34.6 (SD = 8.4; range, 20-60).

The mean OSCQ score was 51.7 (SD = 13.3; range, 18-85). Twenty-one of 89 subjects (23.6%) reported being, at highest, “somewhat” confident of their ability to cope with oral surgery (scores of less than or equal to 44).

The mean DAS score among subjects was 12.5 (SD = 2.4; range, 10-18). The proportion of subjects reporting high dental fear (scores of greater than or equal to 13) was 42.7% (38/89).

The mean DFS score among subjects was 54.0 (SD = 14.5; range, 29-98). The proportion of subjects reporting high dental fear (scores of greater than or equal to 60) was 35.4% (28/79). The responses of only 79 subjects were recorded because some subjects failed to fill out all the items on the DFS.

The Results of Linear Regression Analysis When All Recruitment Scales are in Equation and the Interval Scale of Anxiety Response was Used as a Dependent Variable

В SE Beta T


Dental Fear Survey






Dental Anxiety Scale






Oral Surgery Confidence Questionnaire






Trait Anxiety









Correlations Between Anxiety Measures and Anxiety Before Oral Surgery

No significant correlation was found between anxiety before oral surgery (ISAR) and self-efficacy (OSCQ) or trait anxiety (STAI-T). However, both dental anxiety measures (DFS and DAS) correlated significantly with the ISAR. The Pearson correlation between the ISAR and the DFS was .43 (P < 0.0001); between the ISAR and the DAS, the Pearson correlation was .33 (P < 0.001). The correlation between state anxiety (STAI-S) and the ISAR was .50 (P < 0.0001). Correlation scat-terplots between the DFS and the ISAR, between the DAS and the ISAR, and between the STAI-S and the ISAR are presented in Figures 1 through 3.
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Figure 1. The correlation plot between

Figure 1. The correlation plot between DFS and anxiety before oral surgery (ISAR).

The Ability of Recruitment Measures to Predict Anxiety Before Oral Surgery

Linear regression analysis was performed to test the ability of different recruitment measures to predict ISAR. Linear regression was performed by using the ISAR as the dependent measure and entering all the recruitment measures into the equation. The results are presented in the Table. Of the recruitment measures, the DFS was the only measure that significantly predicted anxiety before oral surgery. The results were the same in repeated analyses with both randomly split halves of the population. When a linear regression analysis was performed entering only the DFS as a recruitment measure into the equation, the DFS explained a large proportion of the variation in the ISAR (F = 17.3, R2 = 42.8%, df = [1,77], P < 0.0001).

Figure 2. The correlation plot between DAS

Figure 2.

Previous Experience

The percentage of subjects with previous dental extraction experience during adulthood was 34.1 (29/85). Subjects with previous dental extraction experience reported higher anxiety before oral surgery than did subjects without extraction experience. The mean ISAR score was 36.9 (SD = 14.7) in subjects with extraction experience and 29.4 (SD = 16.0) in subjects without extraction experience (t = -2.1, P < .037). Mean scores for OSCQ, DAS, DFS, STAI-S, and STAI-T did not differ in subjects according to experience or lack of experience with extraction of permanent teeth. generic cialis 20mg

Trait Anxiety

STAI-T scores did not correlate significantly with ISAR scores. However, subjects who reported higher scores on trait anxiety also reported higher scores on state anxiety (r = .39, P < 0.000). The correlation between STAI-T and OSCQ was also significant (r = -0.39, P < 0.000). Furthermore, subjects with higher scores on dental anxiety reported higher scores on trait anxiety.

Figure 3. The correlation plot between state anxiety

Figure 3. The correlation plot between state anxiety (STAIS) and anxiety before oral surgery (ISAR).

The correlation between DFS and STAI-T was .35 (P < .002). The same trend was seen in the correlation between STAI-T and DAS, but the result was not significant.

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