Table 6.

Equations That Could Be Used to Develop the New Disease Activity Score (EgyDAS)

Parameters	Equation 1	Equation 2	Equation 3	Equation 4	Equation 5
Constant	1.05	5.93*	−1.63*	5.78*	−1.51*
ESR	0.56	0.65*	0.79*	0.65*	0.79*
CRP	0.45	0.38*	0.40*	0.37*	0.41*
Plt	0.60
PDW	−7.27	−7.45*	−6.42*	−7.47*	−6.39*
MPV	−2.47	−3.11*		−3.09*
PCT	0.02	−0.02	0.03
R2	100%	98.4%	93.5%	98.5%	93.3%

Note: *The relationship was significant at 5%.

Abbreviations: CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; MPV, mean platelet volume; Plt, platelet count; PCT, plateletcrit; PDW, platelet distribution width.