TABLE 3 .

Multiple regression analysis of the contribution of baseline HAI titer and NAI titer in reduction of disease severity

Disease severity metric and variable	β	SE	P valuea
Duration of shedding
Constant	5.06105	0.55239	0
HAI titer	−0.11217	0.07961	0.164
NAI titer	−0.41608	0.08180	<0.001*
Duration of symptoms
Constant	10.7425	1.8195	0
HAI titer	−0.1793	0.2622	0.497
NAI titer	−0.7111	0.2695	0.011*
No. of symptoms
Constant	8.31329	1.00208	0
HAI titer	−0.9064	0.14442	0.533
NAI titer	−0.55986	0.14840	<0.001*
Symptom severity score
Constant	156.9632	28.6784	0
HAI titer	0.4885	4.1331	0.906
NAI titer	−15.3006	4.2470	<0.001*

^aStatistically significant P values are indicated with an asterisk.