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Responses to questionnaire administered to participants_
| Question | 1(Not a reason) | 2 | 3 | 4 (very much a reason) |
|---|---|---|---|---|
| 1. To make my smile nicer | 5 (4.5) | 17 (15.5) | 22 (20.0) | 61 (55.5) |
| 2. To help me chew food better | 41 (37.3) | 27 (24.5) | 19 (17.3) | 18 (16.4) |
| 3. To make my family happy | 70 (63.6) | 11 (10.0) | 15 (13.6) | 9 (8.2) |
| 4. To help me with my schoolwork | 88 (80.0) | 7 (6.4) | 6 (5.5) | 4 (3.6) |
| 5. To make my teeth look nicer | 7 (6.4) | 6 (5.5) | 21 (19.1) | 71 (64.5) |
| 6. To help my breathing | 84 (76.4) | 9 (8.2) | 8 (7.3) | 3 (2.7) |
| 7. To feel more confident | 21 (19.1) | 14 (12.7) | 23 (20.9) | 46 (41.8) |
| 8. To help my top and bottom teeth fit together | 8 (7.3) | 15 (13.6) | 24 (21.8) | 57 (51.8) |
| 9. To help me speak more clearly | 47 (42.7) | 21 (19.1) | 13 (11.8) | 24 (21.8) |
| 10. To make my face look better | 31 (28.2) | 23 (20.9) | 28 (25.5) | 23 (20.9) |
| 11. To make me feel better about myself | 32 (29.1) | 14 (12.7) | 23 (20.9) | 36 (32.7) |
| 12. To keep my gums healthy | 16 (14.5) | 19 (17.3) | 32 (29.1) | 37 (33.6) |
| 13. To make me feel healthier | 30 (27.3) | 16 (14.5) | 17 (15.5) | 41 (37.3) |
| 14. To keep me from losing teeth in future | 23 (20.9) | 15 (13.6) | 14 (12.7) | 52 (47.3) |
| 15. To help me make friends | 84 (76.4) | 10 (9.1) | 6 (5.5) | 5 (4.5) |
| 16. To keep my jaw joints healthy | 23 (20.9) | 23 (20.9) | 25 (22.7) | 33 (30.0) |
| 17. To help my front teeth fit together | 9 (8.2) | 14 (12.7) | 31 (28.2) | 51 (46.4) |
| 18. To make me look better | 25 (22.7) | 16 (14.5) | 25 (22.7) | 39 (35.5) |
| 19. To make me feel better about going out | 42 (38.2) | 23 (20.9) | 19 (17.3) | 20 (18.2) |
| 20. To help keep my jaw joint from clicking | 47 (42.7) | 20 (18.2) | 18 (16.4) | 19 (17.3) |
| 21. To help my back teeth fit together | 26 (23.6) | 19 (17.3) | 19 (17.3) | 40 (36.4) |
| 22. To make it easier to get on with people | 79 (71.8) | 8 (7.3) | 9 (8.2) | 8 (7.3) |
| 23. To make it easier to bite into food | 40 (36.4) | 17 (15.5) | 14 (12.7) | 34 (30.9) |
Inter and intra examiner reliability for orthodontist IOTN scores_
| Test | Intra-examiner reliability (IOTN-AC) | Intra-examiner reliability (IOTN-DHC) | Inter-examiner reliability (IOTN-AC) | Inter-examiner reliability (IOTN-DHC) | ||||
|---|---|---|---|---|---|---|---|---|
| Spearman’s correlation | 0.821 | <0.001 | 0.604 | 0.002 | 0.914 | <0.001 | 0.713 | <0.001 |
| Cohen’s Kappa | 0.681 | <0.001 | 0.477 | <0.001 | 0.872 | <0.001 | 0.599 | <0.001 |
Correlation between patient IOTN AC and Questionnaire items Q1 and Q5_
| IOTN-AC patient vs Q1 | Patient IOTN-AC vs. Q5 | Q1 vs Q5 | ||||
|---|---|---|---|---|---|---|
| Test | p value | p value | p value | |||
| Pearson correlation | 0.110 | 0.226 | 0.143 | 0.147 | 0.437 | <0.001 |
Frequency of IOTN scores by severity and gender_
| GENDER | |||
|---|---|---|---|
| Male (%) | Female (%) | Total (%) | |
| Patient -Ac | |||
| Mild | 40 (49.4) | 41 (50.6) | 81 (73.6) |
| Moderate | 7 (63.6) | 4 (36.4) | 11 (10) |
| Severe | 4 (23.5) | 13 (76.5) | 17 (15.5) |
| Total | 51 (46.8) | 58 (53.2) | 109 (99.1) |
| Missing | 1 (0.9) | ||
| Orthodontist -Ac | |||
| Mild | 38 (45.2) | 46 (54.8) | 84 (76.4) |
| Moderate | 0 (0) | 0 (0) | 0 (0) |
| Severe | 14 (58.3) | 10 (41.7) | 24 (21.8) |
| Total | 52 (48.1) | 56 (51.9) | 108 (98.2) |
| Missing | 2 (1.8) | ||
| Orthodontist -DHC | |||
| Moderate | 5 (50) | 5 (50) | 10 (9.1) |
| Severe | 47 (47) | 53 (53) | 100 (90.9) |
| Total | 52 (47.3) | 58 (52.7) | 110 (100) |
Agreement and correlation between patient and orthodontist IOTN AC scores and normative need_
| IOTN-AC patient vs. Orthodontist | Patient IOTN-AC vs. IOTN-DHC | Orthodontist IOTN-AC vs. IOTN-DHC | ||||
|---|---|---|---|---|---|---|
| Test | p value | p value | p value | |||
| Spearman’s correlation | 0.435 | <0.001 | 0.124 | 0.198 | 0.094 | 0.334 |
| Cohen’s Kappa | 0.395 | <0.001 | 0.017 | 0.307 | 0.014 | 0.329 |