Table 3. Sociodemographic and clinical characteristics of the Study 2 sample at baseline, including comparison between patients randomized to group and individual treatment.
| Total sample (n=54) | Individual modality (n=27) | Group modality (n=27) | Test coefficient; p-value | |
|---|---|---|---|---|
| Age (years), mean (SD) | 36.26 (13.55) | 32.67 (14.12) | 40.32 (12.07) | -2.00; 0.51* |
| Female | 48 (88.9) | 24 (88.9) | 24 (88.9) | 1.00† |
| Caucasian | 48 (88.9) | 23 (85.2) | 25 (92.6) | 6.03; 0.10‡ |
| Status | 6.71; 0.15‡ | |||
| Married | 14 (31.5) | 5 (18.5) | 12 (44.4) | |
| Single | 30 (55.6) | 19 (70.4) | 11 (40.7) | |
| Religion | 4.98; 0.41‡ | |||
| Catholic | 21 (38.9) | 9 (33.3) | 12 (44.4) | |
| Agnostic | 13 (24.1) | 9 (33.3) | 4 (14.8) | |
| Occupation | 0.11§ | |||
| Working | 22 (40.7) | 8 (29.6) | 14 (51.9) | |
| Student | 14 (31.5) | 11 (40.7) | 6 (22.2) | |
| Education (years), mean (SD) | 14.23 (3.48) | 14.0 (3.31) | 14.5 (3.73) | 0.62* |
| Income (US$), median (minimum-maximum) | 600 (0-8,500) | 598.8 (0-8,383.23) | 898.2 (0-2,994.01) | 0.15|| |
| Trigger situation | 21 (38.9) | 10 (37) | 11 (40.7) | 0.00; 1.00† |
| Age of SPD onset, median (minimum-maximum) | 15 (4-64) | 18.5 (8-64) | 14 (4-51) | 0.07|| |
| Previous treatment | 4.39; 0.49‡ | |||
| None | 37 (68.5) | 14 (63) | 20 (74.1) | |
| Medication | 11 (20.4) | 7 (25.9) | 4 (14.8) | |
| Family history of SPD | 16 (29.6) | 6 (22.2) | 10 (37) | 0.79; 0.37† |
| Family history of psychiatric disease | 21 (39.6) | 7 (25.9) | 14 (55.6) | 6.56; 0.16† |
| Clinical scales | ||||
| Current depressive episode | 16 (29.6) | 9 (33.3) | 7 (25.9) | 0.15; 0.69† |
| Past depressive episode | 13 (24.1) | 4 (14.8) | 9 (33.3) | 1.43; 0.23† |
| Dysthymia | 3 (5.6) | 1 (3.7) | 2 (7.4) | 1.00§ |
| Bipolar disorder | 4 (7.4) | 2 (7.4) | 2 (7.4) | 1.00§ |
| Panic disorder | 17 (31.5) | 8(29.6) | 9 (33.3) | 0.00; 1.00† |
| Agoraphobia | 9 (16.7) | 4 (14.8) | 5 (18.5) | 1.00§ |
| Social anxiety | 5 (9.3) | 5 (18.5) | 0 (0) | 0.02§¶ |
| Obsessive Compulsive Disorder | 2 (3.7) | 2 (7.4) | 0 (0) | 0.23§ |
| Post-traumatic stress disorder | 3 (5.6) | 1 (3.7) | 2 (7.4) | 1.00§ |
| Nervous bulimia | 2 (3.7) | 2 (7.4) | 0 (0) | 0.23§ |
| Generalized anxiety disorder | 21 (39.6) | 9 (33.3) | 14 (44.4) | 0.20; 0.65† |
| URICA, median (minimum-maximum) | 10.8 (6.4-14) | 11.6 (6.4-12.8) | 9.7 (6.8-14) | 0.07|| |
| SPIS, median (minimum-maximum) | 28.5 (3-48) | 33.0 (7-44) | 23.0 (3-48) | 0.14|| |
| CGI, median (minimum-maximum) | 5 (2-7) | 5 (3-7) | 5 (2-7) | 0.27|| |
| BDI, mean (SD) | 17.3 (11.28) | 19.08 (13.12) | 15.59 (9.1) | 0.98; 0.33* |
| HAM-A, mean (SD) | 29.1 (14.09) | 24.38 (15.13) | 30.63 (13.13) | -0.8; 0.43* |
Data presented as n (%), unless otherwise specified.
BDI = Beck Depression Inventory; CGI = Clinical Global Impression; HAM-A = Hamilton Anxiety Scale; SPIS = Skin Picking Impact Scale; URICA = University of Rhode Island Change Assessment scale.
*
Student’s t-test;
†
Yates Chi-square (continuity correction);
‡
Pearson chi-square;
§
Fisher exact test;
||
Mann-Whitney test.
¶
Statistically significant.