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Percentages of part-of-speech words compared between in-treatment and unknown-treatment datasets.
| POSa | in-treatment (%), mean | unknown-treatment (%), mean | Difference (%), mean (SD) | Paired t test | P value |
| Verbs | 18.50 | 18.20 | 0.3 (1.28) | 3.15 | .002 |
| Nouns | 19.50 | 19.94 | −0.44 (2.57) | −2.35 | .02 |
| Pronouns | 9.19 | 8.93 | 0.26 (1.33) | 2.61 | .01 |
| Adverbs | 6.42 | 6.36 | 0.06 (0.84) | 0.97 | .34 |
| Adjectives | 6.05 | 6.21 | −0.16 (0.95) | −2.34 | .02 |
aPOS: part-of-speech.
