Table 8.

Influencing factors on cost: multivariate linear regression analysis.

Variable	Parameter estimates	Standard error	t	P
Whether hospitalized	−0.25267	0.04839	−5.22	< 0.0001
Prior doses of pneumococcal vaccines	−0.1122	0.05758	−1.95	0.0528

F = 21.17, P < 0.0001.R² = 0.1815, Adj-R² = 0.1729.