Table 2.
Examinations Following Orofacial Symptom Episodes: OPPERA Prospective Cohort Study, 2006 to 2011
| Number of Symptom Episodes |
Number of Examinations |
% Examined | |
|---|---|---|---|
| All people | 721 | 478 | 66.3 |
| Demographics and study site | |||
| Age when enrolled, y | |||
| 18–24 | 250 | 164 | 65.6 |
| 25–34 | 184 | 120 | 65.2 |
| 35–44 | 287 | 194 | 67.6 |
| P value* | .900 | ||
| Gender | |||
| Female | 450 | 293 | 65.1 |
| Male | 271 | 185 | 68.3 |
| P value | .490 | ||
| Race/ethnicity | |||
| White | 325 | 206 | 63.4 |
| Black or African American | 318 | 223 | 70.1 |
| Asian | 19 | 13 | 68.4 |
| Hispanic | 30 | 20 | 66.7 |
| Other or unstated | 29 | 16 | 55.2 |
| P value | .978 | ||
| Study site | |||
| Baltimore, MD | 303 | 184 | 60.7 |
| Buffalo, NY | 153 | 106 | 69.3 |
| Chapel Hill, NC | 113 | 87 | 77.0 |
| Gainesville, FL | 152 | 101 | 66.5 |
| P value | .009 | ||
| Risk predictors recorded at baseline |
|||
| No. of tender body sites | |||
| None | 346 | 238 | 68.8 |
| 1–3 | 216 | 140 | 64.8 |
| ≥4 | 159 | 100 | 62.9 |
| P value | .416 | ||
| Stroop-Pain Δ MAP, mmHg | |||
| <–2 | 273 | 174 | 63.7 |
| −2 to +2 | 205 | 136 | 66.3 |
| >+2 | 121 | 90 | 74.4 |
| P value | .291 | ||
| Pressure pain threshold: trapezius, kPa |
|||
| <275 | 244 | 155 | 63.5 |
| 275–<440 | 240 | 170 | 70.8 |
| ≥440 | 227 | 145 | 63.9 |
| P value | .671 | ||
| Perceived Stress Scale | |||
| <12 | 168 | 105 | 62.5 |
| 12–<18 | 243 | 159 | 65.4 |
| ≥18 | 307 | 212 | 69.1 |
| P value | .071 | ||
| Risk predictors recorded in quarterly health update |
|||
| Number of nonspecific orofacial symptoms |
|||
| None | 188 | 134 | 71.3 |
| 1 | 210 | 133 | 63.3 |
| 2 | 162 | 116 | 71.6 |
| ≥3 | 161 | 95 | 59.0 |
| P value | .109 | ||
| Time since enrollment, mo | |||
| <12 | 180 | 143 | 79.4 |
| 11–<20 | 194 | 137 | 70.6 |
| 20–<30 | 163 | 113 | 69.3 |
| ≥30 | 184 | 85 | 46.2 |
| P value | <.001 |
*
P values are from score-statistic for Type III generalized estimating equation analysis of null hypothesis that percentage examined is equivalent among subgroups. The generalized estimating equation model adjusted for clustering of symptom episodes within people.