Validity and reliability of the modified Tal score in Chilean children. A multicenter study

Area of Science:

• Pediatric emergency medicine
• Respiratory illness assessment
• Clinical scoring systems

Background:

• Accurate assessment of bronchial obstruction severity is crucial in pediatric care.
• Clinical scoring scales, such as the modified Tal score, aid in this evaluation.
• Understanding the validity and reliability of these tools is essential for clinical practice.

Purpose of the Study:

• To evaluate the validity and reliability of the modified Tal score in children presenting with bronchitis or bronchiolitis.
• To assess the score's concurrent criterion validity against oxygen saturation.
• To determine the score's predictive validity for emergency department revisits and its inter-observer reliability.

Main Methods:

• A prospective cohort study included 102 children under 36 months with bronchitis/bronchiolitis.
• Concurrent validity assessed correlation with oxygen saturation.
• Predictive validity examined association with 7-day revisit probability.
• Inter-observer reliability evaluated using the intraclass correlation coefficient (ICC) between kinesiologists and physicians.

Main Results:

• A weak correlation was found between the modified Tal score and oxygen saturation (Rho = -0.41).
• The score demonstrated an association with the probability of a 7-day emergency department revisit.
• Area under the ROC curve exceeded 0.80 for both provider groups.
• Inter-observer reliability between kinesiologists and physicians was weak (ICC = 0.17).

Conclusions:

• The modified Tal score exhibits adequate predictive validity for pediatric respiratory conditions.
• Its concurrent validity with oxygen saturation is poor.
• The score demonstrates weak inter-observer reliability, suggesting caution in its application by different healthcare professionals.