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Table 4 Item parameters and standard errors for the items in the BAI questionnaire across PLWHAs and healthy general population

From: Assessing the measurement invariance of the 10-item Centre for Epidemiological Studies Depression Scale and Beck Anxiety Inventory questionnaires across people living with HIV/AIDS and healthy people

  Factor loading 1st threshold 2nd threshold 3rd threshold
b (SE) τ1 (SE) τ2 (SE) τ3 (SE)
q1: Numbness or tingling     
Healthy 0.887 (0.072) 0.442 (0.481) 1.615 (0.479) 2.846 (0.518)
PLWHA 0.887 (0.072) 0.442 (0.481) 1.615 (0.479) 2.846 (0.518)
q2: Feeling hot     
Healthy 0.797 (0.061) 0.024 (0.441) 0.922 (0.443) 2.387 (0.446)
PLWHA 0.797 (0.061) 0.024 (0.441) 0.922 (0.443) 2.387 (0.446)
q3: Wobbliness in legs     
Healthy 1.089 (0.095) 0.277 (0.630) 1.025 (0.634) 2.222 (0.666)
PLWHA 1.089 (0.095) 0.277 (0.630) 1.025 (0.634) 2.222 (0.666)
q4: Unable to relax     
Healthy 1.115 (0.077) − 0.521 (0.550) 0.818 (0.554) 2.083 (0.570)
PLWHA 1.115 (0.077) − 0.521 (0.550) 0.818 (0.554) 2.083 (0.570)
q5: Fear of worst happening     
Healthy 0.891 (0.060) − 0.519 (0.473) 0.459 (0.476) 1.822 (0.490)
PLWHA 0.891 (0.060) − 0.519 (0.473) 0.459 (0.476) 1.822 (0.490)
q6: Dizzy or lightheaded     
Healthy 1.163 (0.086) − 0.927 (0.671) 0.126 (0.678) 1.588 (0.731)
PLWHA 1.163 (0.086) − 0.927 (0.671) 0.126 (0.678) 1.588 (0.731)
q7: Heart pounding/racing     
Healthy 1.071 (0.075) 0.430 (0.583) 1.550 (0.587) 2.716 (0.598)
PLWHA 1.071 (0.075) 0.430 (0.583) 1.550 (0.587) 2.716 (0.598)
q8: Unsteady     
Healthy 1.130 (0.091) 0.642 (0.587) 1.888 (0.579) 2.957 (0.629)
PLWHA 1.130 (0.091) 0.642 (0.587) 1.888 (0.579) 2.957 (0.629)
q9: Terrified or afraid     
Healthy 1.105 (0.087) 0.463 (0.628) 1.410 (0.619) 2.869 (0.706)
PLWHA 1.105 (0.087) 0.463 (0.628) 1.410 (0.619) 2.869 (0.706)
q10: Nervous     
Healthy 0.914 (0.060) − 1.039 (0.482) 0.064 (0.481) 1.698 (0.496)
PLWHA 0.914 (0.060) − 1.039 (0.482) 0.064 (0.481) 1.698 (0.496)
q11: Feeling of choking     
Healthy 1.251 (0.132) 0.151 (0.812) 1.135 (0.806) 2.233 (0.865)
PLWHA 1.251 (0.132) 0.151 (0.812) 1.135 (0.806) 2.233 (0.865)
q12: Hands trembling     
Healthy 0.985 (0.084) − 0.153 (0.572) 0.748 (0.571) 2.089 (0.646)
PLWHA 0.985 (0.084) − 0.153 (0.572) 0.748 (0.571) 2.089 (0.646)
q13: Shaky/unsteady     
Healthy 1.360 (0.144) − 0.163 (0.801)) (0.084) 0.913 (0.797) 2.119 (0.896)
PLWHA 1.360 (0.144) − 0.163 (0.801)) (0.084) 0.913 (0.797) 2.119 (0.896)
q14: Fear of losing control     
Healthy 0.868 (0.072) − 1.155 (0.536) − 0.044 (0.525) 1.263 (0.592)
PLWHA 0.868 (0.072) − 1.155 (0.536) − 0.044 (0.525) 1.263 (0.592)
q15: Difficulty in breathing     
Healthy 1.161 (0.115) 0.227 (0.852) 1.429 (0.841) 2.436 (0.900)
PLWHA 1.161 (0.115) 0.227 (0.852) 1.429 (0.841) 2.436 (0.900)
q16: Fear of dying     
Healthy 0.539 (0.058) − 0.698 (0.411) − 0.068 (0.406) 0.838 (0.414)
PLWHA 0.539 (0.058) − 0.698 (0.411) − 0.068 (0.406) 0.838 (0.414)
q17: Scared     
Healthy 0.854 (0.071) − 0.262 (0.514) 0.849 (0.508) 1.917 (0.537)
PLWHA 0.854 (0.071) − 0.262 (0.514) 0.849 (0.508) 1.917 (0.537)
q18: Indigestion     
Healthy 0.800 (0.069) 0.421 (0.498) 1.339 (0.496) 2.359 (0.529)
PLWHA 0.800 (0.069) 0.421 (0.498) 1.339 (0.496) 2.359 (0.529)
q19: Faint/lightheaded     
Healthy 1.557 (1.262) 1.740 (1.280) 1.470 (1.212) 143.472 2.853 (2.245)
PLWHA 1.557 (1.262) 1.740 (1.280) 1.470 (1.212) 143.472 2.853 (2.245)
q20: Face flushed     
Healthy 0.626 (0.064) 1.290 (0.508) 2.208 (0.514) 2.986 (0.520)
PLWHA 0.626 (0.064) 1.290 (0.508) 2.208 (0.514) 2.986 (0.520)
q21: Hot/ cold sweats     
Healthy 0.785 (0.066) 0.577 (0.463) 1.329 (0.463) 2.573 (0.470)
PLWHA 0.785 (0.066) 0.577 (0.463) 1.329 (0.463) 2.573 (0.470)
  1. b: factor loading, τi: threshold parameters, SE: standard error