(b).

Age	N	CARS at baseline	CARS after treatment	paired t-test	p value
		( Mean ± SD)	( Mean ± SD)
1	1	38	38
2	10	39.35 ± 5.2	33.6 ± 4.9	3.31	0.009
3	31	40.01 ± 5.8	33.96 ± 5.9	7.79	<0.0001
4	19	41.37 ± 6.7	34 ± 7.9	4.66	0.0002
5	10	42.8 ± 8.2	33.55 ± 5.5	4.99	0.0007
≥ 6	11	45.09 ± 6.46	37.7 ± 5.15	6.02	0.0001