| Component of SSC score† | Bloating alone vs controls | Distention vs controls | Distention vs bloating alone |
| Heart palpitations (pounding or racing) | 1.7 (1.4 to 2.0) | 2.3 (1.9 to 2.7) | 1.3 (1.1 to 1.6) |
| Nervousness or shakiness | 1.8 (1.6 to 2.1) | 2.2 (1.9 to 2.6) | 1.2 (1.02 to 1.4) |
| Weakness | 1.6 (1.4 to 1.9) | 2.0 (1.7 to 2.3) | 1.2 (1.04 to 1.5) |
| Dizziness | 1.5 (1.2 to 1.7) | 1.9 (1.6 to 2.3) | 1.3 (1.1 to 1.6) |
| Fatigue (tiredness) | 1.6 (1.4 to 1.7) | 1.9 (1.8 to 2.2) | 1.2 (1.1 to 1.4) |
| Feeling anxious, fearful or afraid | 1.6 (1.3 to 1.8) | 1.9 (1.6 to 2.2) | 1.2 (1.02 to 1.5) |
| Depression (feeling sad or blue) | 1.5 (1.3 to 1.7) | 1.8 (1.6 to 2.1) | 1.2 (1.1 to 1.5) |
| Eye pain associated with reading | 1.4 (1.2 to 1.7) | 1.7 (1.5 to 2.0) | 1.2 (1.03 to 1.5) |
| Insomnia | 1.4 (1.2 to 1.5) | 1.7 (1.5 to 1.9) | 1.3 (1.1 to 1.4) |
| Joint pains | 1.4 (1.3 to 1.5) | 1.5 (1.3 to 1.6) | 1.1 (0.9 to 1.2) |
| General stiffness | 1.4 (1.3 to 1.6) | 1.5 (1.4 to 1.7) | 1.1 (0.95 to 1.2) |
| Hot or cold spells | 1.2 (1.04 to 1.3) | 1.4 (1.2 to 1.5) | 1.2 (1.01 to 1.3) |
| Asthma | 1.6 (1.3 to 1.9) | 1.9 (1.6 to 2.2) | 1.2 (0.98 to 1.5) |
| Trouble breathing | 1.6 (1.3 to 1.8) | 1.8 (1.6 to 2.1) | 1.2 (0.99 to 1.4) |
| Headaches | 1.5 (1.3 to 1.7) | 1.7 (1.4 to 1.9) | 1.1 (0.9 to 1.3) |
| Backaches | 1.5 (1.4 to 1.7) | 1.6 (1.5 to 1.8) | 1.1 (0.9 to 1.2) |
| High blood pressure | 1.3 (1.1 to 11.4) | 1.2 (1.0 to 1.4) | 0.9 (0.8 to 1.1) |
*Models adjusted for age and gender.
†Per unit higher.