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Figure 2. TMD incidence rates and haplotype prevalence in psychological subgroups. Data are from n = 171 participants with 5 common haplotypes of COMT and who completed at least one follow-up assessment in the three-year cohort study. The number of participants in each psychological subgropup is shown in parentheses and may not sum to 171, due to missing values of psychological variables. Unshaded bars depict annual incidence rates and 95%CIs for TMD, computed as described for Fig. 1. Shaded bars depict percentage (and 95%CIs) of people with pain-sensitive haplotypes in each psychological subgroup. BSI = Brief Symptom Inventory; POMS = Profile of Mood States questionnaire. Incidence density ratios (IDRs) were computed as described for Fig. 1. Prevalence ratios were computed with Cochran-Mantel-Haenszel estimates. IDR 95%CIs for all 3 psychological factors exclude the null value of 1.0, and therefore represent statistically significant differences in TMD risk among psychological groups. Prevalence ratio and 95%CIs for all psychological factors include the null value of 1.0, and therefore represent statistically non-significant differences among psychological groups in percentages of people with pain-sensitive haplotypes.
J DENT RES, Vol. 86, No. 11,
1120-1125 (2007)
DOI: 10.1177/154405910708601119
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