Table 2.

Infections requiring hospitalizations by Ig level

	IgG level and number of infections requiring hospitalization, n (%)			P-valuea
	≥750 mg/dL	376–749 mg/dL	0–375 mg/dL
	(n = 10)	(n = 14)	(n=6)
	1 (10%)	0 (0%)	3 (50%)	0.01
				0.10
	≥46 mg/dL	24–45 mg/dL	0–23 mg/dL
	(n = 16)	(n = 5)	(n=9)
	1 (6%)	0 (0%)	3 (33%)
				<0.001
	≥82 mg/dL	41–81 mg/dL	0–41 mg/dL
	(n = 19)	(n = 8)	(n=3)
	1 (5%)	0 (0%)	3 (100%)

^aFisher’s exact t-test.