Table 2. Multiple regression analysis results.

Objict variable	Dependent variale	Paritial regression coefficient	Standard deviation	Standardized paritial regression coefficient	95% Confidence Interval		P	R2
					Upper	Lower
PLI	Age	0.0043	0.0050	0.5840	0.0030	0.0053	2.3×10−14	0.3240
	Sex	–0.1690	0.1060	0.1090	–0.3800	0.0041	nsa)
	PCR	0.0928	0.0096	0.0650	–0.1000	0.2830	nsa)
GI	Age	0.0035	0.0004	0.5690	0.0030	0.0040	1.4×10−14	0.3710
	Sex	–0.1682	0.0852	0.1310	–0.3400	0.0000	nsa)
	PCR	0.2845	0.0077	0.2410	0.1390	0.4370	3.2×10−4
PPD	Age	0.0016	0.0001	0.6670	0.0010	0.0020	5.5×10−20	0.4430
	Sex	–0.0629	0.0308	0.1270	–0.1200	–0.0020	4.3×10−2
	PCR	0.0566	0.0279	0.1250	0.0010	0.1120	4.5×10−2

^a)ns: not significant.