| Item | Classical M (SD) | Popular M (SD) | ||
|---|---|---|---|---|
| Water | 3.88 (0.94) | 3.94 (0.74) | –.374 | .709 |
| Caffeine | 3.28 (1.01) | 3.67 (0.82) | –2.328 | .022 |
| Smoking | 4.02 (1.16) | 4.29 (0.92) | –1.412 | .160 |
| Alcohol | 4.17 (0.90) | 4.13 (0.85) | .285 | .776 |
| Milk | 3.00 (1.27) | 3.00 (1.05) | <.001 | 1.000 |
| Midnight snack | 4.02 (1.08) | 3.35 (1.05) | 3.443 | .001 |
| Overeat | 3.98 (0.96) | 3.48 (0.88) | 3.026 | .003 |
| Spicy food | 4.09 (0.84) | 3.54 (0.93) | 3.375 | .001 |
| Sleep | 4.48 (0.73) | 4.25 (0.72) | 1.736 | .085 |
| Cough | 3.88 (1.03) | 3.75 (0.80) | .799 | .426 |
| Long speaking | 4.33 (0.85) | 4.13 (0.83) | 1.314 | .191 |
| Shouting | 4.57 (0.77) | 4.38 (0.63) | 1.466 | <.001 |
| Whispering | 3.76 (1.20) | 3.19 (0.95) | 2.896 | .005 |
| Speaking in dust | 4.50 (0.68) | 4.06 (0.78) | 3.265 | .001 |
| Singing in dust | 4.53 (0.54) | 4.24 (0.82) | 2.336 | .021 |
| Tight cloth | 2.93 (1.23) | 3.25 (0.86) | –1.663 | .099 |
| Tight cloth on stage | 3.55 (1.10) | 3.40 (0.96) | .829 | .409 |
| Breathing | 3.71 (1.01) | 3.56 (0.84) | .900 | .370 |
| Breathing in singing | 4.36 (0.77) | 3.89 (0.97) | 2.963 | .004 |
| Singing within vocal range | 4.36 (0.77) | 3.69 (0.63) | –4.898 | <.001 |
| Total | 79.10 (8.52) | 75.62 (9.00) | 2.184 | .031 |