Table 7. PWID subpopulations trend analysis with linear, quadratic and cubic models of time.

	Intercept	Linear	Quadratic	Cubic
Non-Hispanic White	85.17	0.32	0.13**	−0.01
Non-Hispanic Black	211.80	−8.38**	1.01**	0.02
Hispanic	132.73	−3.06**	0.24**	−0.02
Male	138.46	−1.41**	0.17**	−0.02
Female	78.90	−0.28	−0.01	−0.01
Young (15–29)	100.64	3.52**	0.18**	−0.03*
Old (30–64)	113.25	−2.68**	0.04	−0.01

^**pseudo-p<0.001;

^*pseudo- p<0.05.