Table 3. Distribution of Beijing genotype strains in new cases and previously treated cases in different age groups.

	Children		P value	Adolescents		P value	Adults		P value	Total		P value
	Beijing	non-Beijing		Beijing	non-Beijing		Beijing	non-Beijing		Beijing	non-Beijing
	N (%)	N (%)		N (%)	N (%)		N (%)	N (%)		N (%)	N (%)
New cases	61 (91.0)	6 (9.0)	0.029	87 (78.4)	24 (21.6)	0.195	98 (75.4)	32 (24.6)	1.000	246 (79.9)	62 (20.1)	0.897
Previouslytreated cases	16 (69.6)	7 (30.4)		42 (87.5)	6 (12.5)		46 (75.4)	15 (24.6)		104 (78.8)	28 (21.2)