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Table 2 Percentage of correct answer, discrimination index, and item-total correlation of health literacy items

From: Health literacy in Beijing: an assessment of adults’ knowledge and skills regarding communicable diseases

  Items % correct PH PL D Item-total correlation
Knowledge What is the normal body temperature? 36.3 0.221 0.523 0.302 0.232
  What diseases do vaccines protect against? 86.6 0.702 0.984 0.283 0.367
  Which is the best way for influenza prevention? 79.1 0.574 0.952 0.378 0.371
  Which is the best way for measles prevention? 46.5 0.286 0.681 0.395 0.287
  What are the typical clinical symptoms of tuberculosis? 74.7 0.540 0.943 0.403 0.377
  How is hepatitis A spread? 48.6 0.293 0.731 0.438 0.327
  Which of the following is the correct path for the transmission of hepatitis B? 23.9 0.078 0.512 0.433 0.360
  Which of the following is the correct path for the transmission of HIV? 39.6 0.138 0.698 0.560 0.416
Preventative measures and behaviors How many days did you do physical activities more than 30 min per day in the past week? 38.1 0.280 0.498 0.218 0.173
Do you spit up phlegm in public? 93.9 0.818 0.996 0.178 0.337
Do you cover up when you want to sneeze or cough? 93.4 0.806 0.994 0.189 0.343
  Do you wash your hands before eating, after using the bathroom? 54.4 0.258 0.840 0.582 0.445
  Do you wear mask when visiting someone at the hospital? 20.9 0.063 0.420 0.357 0.322
  Do you often open the windows to keep 86.4 0.688 0.977 0.289 0.348
The air circulation during the respiratory infectious diseases epidemics?
  Do you separate raw and cooked food when cooking or preserving them? 77.2 0.549 0.942 0.393 0.375
  Will you visit restaurants with poor sanitation? 28.8 0.109 0.568 0.459 0.371
  Do you share towels with others? 66.6 0.410 0.886 0.476 0.391
  Do you visit a dentist at an irregular outpatient clinic? 92.4 0.832 0.988 0.156 0.263
  Do you uptake rabies vaccine after a dog or cat bite? 76.1 0.530 0.938 0.408 0.379
  Will you pay attention to infectious disease epidemics at your destination when you want to travel? 72.8 0.421 0.935 0.514 0.458
Health skills Can you easily get the information about infectious diseases? 41.2 0.091 0.817 0.725 0.534
  Can you read drug instructions? 48.1 0.115 0.889 0.773 0.562
  Can you easily read popular science readings about infectious diseases? 48.3 0.096 0.916 0.820 0.598
  Can you read laboratory sheets? 47.9 0.190 0.818 0.628 0.468
  Can you use the thermometer? 76.9 0.579 0.927 0.348 0.341
Overall   61.3 0.387 0.815 0.428