Table 3.

RTI episodes in two groups during follow-up visit

Follow-up visit period	Disease diagnosis		Group with GHRS	Group without GHRS	Z value	P value
3 months	URTI		232	179	−2.478	0.013*
	LRTI	Bronchitis	16	9	−0.471	0.638
		Pneumonia	2	2
	RTI		250	190	−2.551	0.011*
6 months	URTI		449	329	−3.542	0.000**
	LRTI	Bronchitis	29	19	−0.553	0.581
		Pneumonia	6	7
	RTI		484	355	−3.582	0.000**
9 months	URTI		606	441	−3.990	0.000**
	LRTI	Bronchitis	32	28	−0.319	0.750
		Pneumonia	8	8
	RTI		646	477	−3.710	0.000**
12 months	URTI		723	519	−3.915	0.000**
	LRTI	Bronchitis	35	34	−0.240	0.811
		Pneumonia	9	9
	RTI		767	562	−3.553	0.000**

*P < 0.05 shows there is significant difference between two groups

**P < 0.01 shows there is highly significant difference between two groups