Figure 4: Comparison of the St. George's Respiratory Questionnaire and quality of life results in spinal cord injury patients undergoing oral motor respiratory exercise and vocal intonation therapy or respiratory training. Intervention group: oral motor respiratory exercise and vocal intonation therapy; control group: respiratory training. (A) St. George's Respiratory Questionnaire; (B) quality of life. Data are expressed as the mean ± SD (n = 9) and were analyzed by two-way analysis of variance. **P < 0.01. The baseline is indicated by 0.