Table 4.
Confirmatory factor analysis model step.
| Model step | X2 | df | p | TLI | CFI | RMSEA |
|---|---|---|---|---|---|---|
| CFA (n = 2589) | ||||||
| Initial model | 1306.304 | 242 | < 0.01 | 0.858 | 0.875 | 0.042 |
| Correlated s17 and s18 | 1237.534 | 241 | < 0.01 | 0.866 | 0.883 | 0.04 |
| Correlated s11 and s16 | 1196.863 | 240 | < 0.01 | 0.871 | 0.888 | 0.04 |
| Correlated s3 and s17 | 1148.562 | 239 | < 0.01 | 0.877 | 0.894 | 0.039 |
| Correlated s12 and s14 | 1122.326 | 238 | < 0.01 | 0.88 | 0.897 | 0.038 |
| Correlated s11 and s14 | 1087.798 | 237 | < 0.01 | 0.884 | 0.9 | 0.038 |
| Correlated s7 and s24 | 1067.157 | 236 | < 0.01 | 0.886 | 0.903 | 0.037 |
| Correlated s3 and s2 | 1043.252 | 235 | < 0.01 | 0.889 | 0.905 | 0.037 |
| Correlated s11 and s15 | 1022.788 | 234 | < 0.01 | 0.891 | 0.908 | 0.037 |
| Correlated s3 and s15 | 974.742 | 233 | < 0.01 | 0.897 | 0.913 | 0.036 |
| Correlated s5 and s17 | 950.71 | 232 | < 0.01 | 0.9 | 0.916 | 0.035 |
| Correlated s3 and s5 | 925.701 | 231 | < 0.01 | 0.903 | 0.919 | 0.035 |
| Correlated s5 and s11 | 897.836 | 230 | < 0.01 | 0.906 | 0.922 | 0.034 |
| Correlated s10 and s16 | 869.433 | 229 | < 0.01 | 0.91 | 0.925 | 0.033 |
| Correlated s12 and s23 | 845.065 | 228 | < 0.01 | 0.913 | 0.928 | 0.033 |
| Correlated s21 and s22 | 824.629 | 227 | < 0.01 | 0.915 | 0.93 | 0.032 |
| Correlated s9 and s16 | 806.169 | 226 | < 0.01 | 0.917 | 0.932 | 0.032 |
| Correlated s7 and s8 | 787.313 | 225 | < 0.01 | 0.919 | 0.934 | 0.031 |
| Correlated s17 and s19 | 773.107 | 224 | < 0.01 | 0.921 | 0.936 | 0.031 |
| Correlated s10 and s2 | 755.878 | 223 | < 0.01 | 0.923 | 0.938 | 0.031 |
| Correlated s14 and s18 | 738.436 | 222 | < 0.01 | 0.925 | 0.94 | 0.03 |
| Correlated s14 and s6 | 717.827 | 221 | < 0.01 | 0.927 | 0.942 | 0.03 |
| Correlated s15 and s17 | 697.204 | 220 | < 0.01 | 0.93 | 0.944 | 0.029 |
| Correlated s10 and s17 | 674.825 | 219 | < 0.01 | 0.933 | 0.947 | 0.029 |
| Correlated s10 and s11 | 659.193 | 218 | < 0.01 | 0.935 | 0.948 | 0.028 |
| Correlated s7 and s11 | 642.014 | 217 | < 0.01 | 0.937 | 0.95 | 0.028 |
| Correlated s11 and s24 | 631.548 | 216 | < 0.01 | 0.938 | 0.951 | 0.028 |
| Correlated s12 and s16 | 616.712 | 215 | < 0.01 | 0.94 | 0.953 | 0.027 |
| Correlated s12 and s8 | 605.06 | 214 | < 0.01 | 0.941 | 0.954 | 0.027 |
| Correlated s14 and s17 | 589.606 | 213 | < 0.01 | 0.943 | 0.956 | 0.026 |
| Correlated s7 and s16 | 577.972 | 212 | < 0.01 | 0.944 | 0.957 | 0.026 |
| Correlated s7 and s14 | 565.205 | 211 | < 0.01 | 0.946 | 0.959 | 0.026 |
| Correlated s12 and s21 | 550.799 | 210 | < 0.01 | 0.948 | 0.96 | 0.025 |
| Correlated s24 and s22 | 535.47 | 209 | < 0.01 | 0.95 | 0.962 | 0.025 |
| Correlated s14 and s22 | 523.798 | 208 | < 0.01 | 0.951 | 0.963 | 0.025 |
| Correlated s18 and s21 | 513.721 | 207 | < 0.01 | 0.952 | 0.964 | 0.024 |
Tucker-Lewis Index=TLI; CFI = Comparative Fit Index; RMSEA = Root Mean Square Error of Approximation; s1, arrhythmia; s2, blurry vision; s3, bone aches in extremities; s4, changed sense of taste; s5, chills but no fever; s6, confusion; s7, cough; s8, difficulty concentrating or focusing; s9, dizziness; s10, fatigue; s11, fever or chills; s12, headache; s13, heart palpitations; s14, inability to exercise or be active; s15, joint pain; s16, memory problems; s17, muscle or body aches; s18, partial or complete loss of sense of smell; s19, partial or complete loss of sense of taste; s20, persistent chest pain or pressure; s21, shortness of breath or difficulty breathing; s22, shortness of breath or exhaustion from bending over; s23, sleeping more than usual; s24, tachycardia.