Table 3.

HIV-negative NS risk factor weight rating scale

Risk factors	Groups	Wij	βi	D	Pointsij (Pointsij)
Age (year)			0.050
	< 20	15.5		− 0.450	− 1
	20 ~ 29	24.5 = W1REF		0.000	0
	30 ~ 39	34.5		0.500	1
	40 ~ 49	44.5		1.000	2
	50 ~ 59	54.5		1.500	3
	≥ 60	68.5		2.200	4
Gender			1.431
	Female	0 = W2REF		0	0
	Male	1		1.431	3
Serum TRUST quantitatea			0.502
	0	0 = W3REF		0.000	0
	1	1		0.502	1
	2	2		1.004	2
	3	3		1.506	3
	4	4		2.008	4

^a0 indicates that the serum TRUST is qualitatively negative; 1 indicates that the serum TRUST quantitate is 1:1 ~ 1:2; 2 indicates 1:4 ~ 1:8; 3 indicates 1:16 ~ 1:32, and 4 indicates ≥ 1:64

D = (W_ij − W_iREF) * β_i

B = 5 * β_i

Points_ij = D/B