Table 1.

The mean of RI, PT, RL, and UV

	RI	PT	RL	UV
2-9	-----	-----	-----	-2.48
10-19	-----	-----	-----	-1.6
20-29	23.9	12.9	10.9	0.85
30-39	24.2	13.1	11.1	1.1
40-49	23.6	12	9.9	1.35
≥50	23.67	12.3	10.4	1.07
P.value	0.965	0.884	0.742	0.000