Exploratory Factor Analysis: Pattern Matrix for Three Factor Model
| Symptom (Questionnaire) | Factor | ||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
| Straining to talk is tiring (LPR-HRQL) | 0.90 | ||||||
| Being hoarse makes it hard for me to communicate my true self (LPR-HRQL) | 0.88 | ||||||
| I feel embarrassed about the sound of my voice (LPR-HRQL) | 0.85 | ||||||
| My voice makes others feel uncomfortable to listen to me (LPR-HRQL) | 0.81 | ||||||
| I avoid talking because of the effort (LPR-HRQL) | 0.78 | ||||||
| Hoarseness (CReSS) | 0.76 | ||||||
| My voice problems make it difficult for me to work (LPR-HRQL) | 0.75 | ||||||
| Hoarseness (RSI) | 0.75 | ||||||
| I find it hard to meet new people because of what they will think (LPR-HRQL) | 0.68 | ||||||
| I am afraid I might lose my voice forever (LPR-HRQL) | 0.65 | ||||||
| I can’t sing as much as I would like to because of my voice (LPR-HRQL) | 0.60 | ||||||
| The sound of my voice makes people think I’m angry or upset (LPR-HRQL) | 0.60 | ||||||
| Troublesome cough (RSI) | 0.85 | ||||||
| Coughing when upright (CReSS) | 0.85 | ||||||
| Coughing after eating or lying down (RSI) | 0.83 | ||||||
| Coughing when lying down (CReSS) | 0.78 | ||||||
| Cough after eating (CReSS) | 0.71 | ||||||
| People think I am sick because of my coughing (LPR-HRQL) | 0.69 | ||||||
| I worry about having a coughing spell at a bad time (LPR-HRQL) | 0.67 | ||||||
| I have to leave the room because of my coughing (LPR-HRQL) | 0.62 | ||||||
| My co-workers can hear me coming because of my coughing (LPR-HRQL) | 0.53 | ||||||
| Indigestion (CReSS) | 0.87 | ||||||
| Heartburn, chest pain, indigestion or stomach acid coming up(RSI) | 0.87 | ||||||
| Stomach acid coming up (CReSS) | 0.86 | ||||||
| Heartburn (CReSS) | 0.86 | ||||||
| Acid/ sour taste in mouth (CReSS) | 0.63 | ||||||
| Regurgitation (CReSS) | 0.54 | ||||||
| Belching (CReSS) | 0.53 | ||||||
| Bloating (CReSS) | 0.46 | ||||||
| Excess mucus (CReSS) | 0.77 | ||||||
| Throat clearing (CReSS) | 0.74 | ||||||
| Excess throat mucus or post-nasal drip (RSI) | 0.71 | ||||||
| Throat clearing (RSI) | 0.70 | ||||||
| Mucus dripping down back of throat (CReSS) | 0.67 | ||||||
| I feel frustrated about having to clear my throat so often (LPR-HRQL) | 0.56 | ||||||
| People notice how much I have to clear my throat (LPR-HRQL) | 0.50 | ||||||
| Difficulty swallowing food (CReSS) | 0.70 | ||||||
| I awaken from sleep gasping for breath (LPR-HRQL) | 0.64 | ||||||
| Choking (CReSS) | 0.60 | ||||||
| I am afraid of choking in my sleep (LPR-HRQL) | 0.58 | ||||||
| Difficulty swallowing food liquids or tablets (RSI) | 0.57 | ||||||
| Difficulty swallowing liquids (CReSS) | 0.57 | ||||||
| Difficulty Breathing (CReSS) | 0.53 | ||||||
| Breathing difficulties or choking episodes (RSI) | 0.46 | ||||||
| Something caught or lump in throat (RSI) | 0.68 | ||||||
| Feeling things stuck throat (CReSS) | 0.62 | ||||||
| Lump in Throat (CReSS) | 0.62 | ||||||
| Clearing my throat has a negative effect on friendships (LPR-HRQL) | 0.70 | ||||||
| Clearing my throat has a negative effect on sex (LPR-HRQL) | 0.58 | ||||||
| I avoid social events because of the need to clear my throat (LPR-HRQL) | 0.53 | ||||||
CReSS, Comprehensive Reflux Symptom Score; LPR-HRQL, Laryngopharyngeal Reflux – Health-Related Quality of Life; RSI, Reflux Symptom Index.