. 2017 May;46(5):626–633.

Table 3:

Age wise mean concentration (ug/L) of heavy metals in serum samples of control and RA patients

Metal	Age Group	20–35		36–50		51–60
Pb	Studied Group	Mean ±SD	S.E	Mean ±SD	S.E	Mean ±SD	S.E
	RA	2.306± 0.90 ^NS	0.17	2.309 ±1.34 ^NS	0.129	1.943±0.76 ^NS	0.094
	Control	2.029±1.01 ^NS	0.15	2.22±1.283 ^NS	0.11	2.28±0.77 ^NS	0.12
Cd	RA	0.198±0.353 ^NS	0.069	0.35±0.898 ^NS	0.086	0.203±0.6 ^NS	0.074
	Control	0.29±0.704 ^NS	0.104	0.207±0.638^NS	0.05	0.515±1.07^NS	0.174
Cr	RA	0.215±0.136 ^NS	0.02	0.258±0.174 ^NS	0.016	0.280±0.18^NS	0.02
	Control	0.288±0.20 ^NS	0.03	0.266±0.16 ^NS	0.015	0.20±0.153 ^NS	0.024
Ni	RA	115.37±7.13 ^NS	1.39	112.6±8.58 ^NS	0.82	111.1±15.2^NS	1.88
	Control	108.5±17.903^*	2.66	113.2±8.07^*	0.74	114.9±6.74^*	1.094

N = number of observations (respondents)

NS = Non-significant (P>0.05);

= Significant (P<0.05);

^**

= highly significant (P<0.01)