Erratum

In “Development of a Global Respiratory Severity Score (GRSS) for Respiratory Syncytial Virus Infection in Infants” by Caserta et al. [J Infect Dis 2017 jiw624. doi: 10.1093/infdis/jiw624], the authors report errors in Table 3. They have revised the Global Respiratory Severity Score formula and weightings after re-analysis of the data, and report that these changes do not alter their interpretations and conclusions. The authors regret any inconvenience caused by the errors.

[For reference, the original Table 3 is also included below.]

Corrected Table 3.

Table 3. Mathematical equation constructed by factor analysis to calculate the Global Respiratory Severity Score (GRSS).

$$\text{GRSS is}={\displaystyle \sum _{j=1}^9{X}_j{\beta }_j+c,c=6.44}$$

Here , j=1,2,…, 9 are the clinical variables used in the analysis, βj are the weights assigned to these variables and are listed in the table below. Also listed in this table are mean imputation values for each variable that were applied to the 7 subjects with missing data.

Variable	βj	Imputed valuesa
General appearance	0.711	1.144
Wheezing	0.946	0.558
Rales/rhonchi	1.099	0.507
Retractions	1.383	0.691
Cyanosis	0.784	0.050
Lethargy	0.520	0.190
Poor air movement	0.631	0.134
Worst room air SaO2	-0.079	90.209
Maximum respiratory rate	0.036	58.036

^aimputed values were defined as the mean value calculated from all subjects

Original Table 3.

Table 3. Mathematical equation constructed by factor analysis to calculate the Global Respiratory Severity Score (GRSS).

$$\text{GRSS is}={\displaystyle \sum _{j=1}^9{X}_j{\beta }_j+c,c=6.46}$$

Here , j=1,2,…, 9 are the clinical variables used in the analysis, βj are the weights assigned to these variables and are listed in the table below. Also listed in this table are mean imputation values for each variable that were applied to the 7 subjects with missing data.

Variable	βj	Imputed valuesa
General appearance	0.719	1.144
Wheezing	0.936	0.558
Rales/rhonchi	1.150	0.507
Retractions	1.360	0.691
Cyanosis	0.812	0.050
Lethargy	0.475	0.190
Poor air movement	0.735	0.134
Worst room air SaO2	-0.078	90.360
Maximum respiratory rate	0.034	57.015

^aimputed values were defined as the mean value calculated from all subjects