Table 4.
Mean YGTSS total tic score (TTS) at 12 months stratified by categorical variables measured at baseline.
| Predictor | Group 1 (N) | mean ± SD | Group 2 (N) | mean ± SD | F | p |
|---|---|---|---|---|---|---|
| Sex | M (26) | 14.192 ± 5.685 | F (13) | 14.077 ± 8.470 | 0.003 | 0.956 |
| First-degree relative with tics | Yes (15) | 11.933 ± 5.216 | No (24) | 15.542 ± 7.126 | 3.445 | 0.072 |
| - Parent with tics | Yes (9) | 12.333 ± 5.220 | No (30) | 14.700 ± 6.979 | 1.057 | 0.311 |
| Phonic tics (ever) | Yes (32) | 14.844 ± 6.441 | No (7) | 11.000 ± 7.047 | 2.313 | 0.137 |
| 3 or more vocal tics | Yes (11) | 18.364 ± 5.853 | No (28) | 12.500 ± 6.251 | 8.160 | 0.007 |
| Tic below the neck | Yes (27) | 14.519 ± 6.963 | No (12) | 13.333 ± 6.005 | 0.318 | 0.576 |
| Non-tic K-SADS diagnosis | Yes (31) | 14.516 ± 6.708 | No (8) | 12.750 ± 6.541 | 0.542 | 0.466 |
| ADHD diagnosis | Yes (14) | 12.786 ± 7.319 | No (25) | 14.920 ± 6.231 | 1.159 | 0.289 |
| OCD diagnosis | Yes (5) | 15.600 ± 7.403 | No (34) | 13.941 ± 6.601 | 0.334 | 0.567 |
| Anxiety disorder | Yes (20) | 16.000 ± 6.882 | No (19) | 12.211 ± 5.912 | 4.250 | 0.047 |
F statistic and p value reported for ANCOVA.