Table 1. Patient, tooth, and procedure characteristics.
| Characteristic | Overall |
|---|---|
|
| |
| Patient-Related Characteristics | |
|
| |
| Mean (SD) age in years | 47.8 (13) |
| Number missing | 13 |
|
| |
| Female gender: n (%) | 409 (59) |
| Number missing | 10 |
|
| |
| Ethnicity: n (%) | |
| Hispanic/Latino | 29 (4) |
| Non-Hispanic/Latino | 663 (96) |
| Number missing | 16 |
|
| |
| Race: n (%) | |
| White | 633 (91) |
| Black/African American | 38 (5) |
| Other | 28 (4) |
| Number missing | 9 |
|
| |
| Highest level of education completed: n (%) | |
| <College degree | 340 (49) |
| College degree or more advanced degree | 359 (51) |
| Number missing | 9 |
|
| |
| Annual household income: n (%) | |
| <$30,000 | 105 (16) |
| >$30,000 | 570 (84) |
| Number missing | 33 |
|
| |
| Patient has dental insurance/third party coverage: n (%) yes | 571 (81) |
| Number missing | 6 |
|
| |
| Tooth-Related Characteristics | |
|
| |
| Maxillary tooth: n (%) | 417 (59) |
| Number missing | 0 |
|
| |
| Posterior tooth: n (%) | 631 (89) |
| Molar | 434 (69) |
| Premolar | 197 (31) |
| Number missing | 0 |
|
| |
| Bleeding present upon opening the pulp chamber: n (%) yes | 359 (51) |
| Number missing | 0 |
|
| |
| Swelling associated with tooth: n (%) yes | 67 (10) |
| Number missing | 13 |
|
| |
| Tooth exhibits radiolucency of endodontic origin: n (%) yes | 302 (43) |
| Number missing | 7 |
|
| |
| Pulpal endodontic diagnoses: n (%) * | |
| Necrotic pulp | 377 (54) |
| Normal pulp or reversible pulpitis | 68 (10) |
| Irreversible pulpitis | 257 (37) |
| Number missing | 6 |
|
| |
| Apical endodontic diagnoses: n (%) * | |
| Normal apical tissue | 163 (24) |
| Symptomatic apical periodontitis | 364 (54) |
| Asymptomatic apical periodontitis | 42 (6) |
| Acute apical abscess | 45 (7) |
| Chronic apical abscess | 57 (8) |
| Number missing | 37 |
|
| |
| Procedure-Related Characteristics | |
|
| |
| Practitioner type: n (%) | |
| General practitioner | 295 (42) |
| Endodontic specialist | 413 (58) |
| Number missing | 0 |
|
| |
| Number of appointments needed to complete the root canal treatment: n (%) | |
| 1 appointment | 559 (79) |
| 2 appointments | 143 (20) |
| 3 appointments | 6 (1) |
| Number missing | 0 |
|
| |
| Practitioner considered procedure significantly more difficult than typical RCTs performed in practice: n (%) | |
| Yes | 92 (13) |
| No | 616 (87) |
| Number missing | 0 |
|
| |
| Practitioner's impression of quality of local anesthesia during procedure: n (%) | |
| Excellent, patient felt nothing | 471 (67) |
| Adequate, patient experienced non-painful sensations | 128 (18) |
| Marginal, patient experienced some pain | 97 (14) |
| Less than marginal, patient experienced a lot of pain | 6 (1) |
| Number missing | 6 |
*
Total percentage does not equal 100% due to rounding