Table 3.

Changes in biochemical and immunological parameters with examination stress

Parameter	Baseline (±SEM)	Examination stress (±SEM)	P-value (baseline vs exam stress)
Serum cortisol levels (ng/ml)
Control group (n=30)	121±11.5	281.77±17.4	P<0.001
Yoga group (n=30)	119.9±6.2	231.63±14.1*	P=0.008
Serum IL-4 (mg/ml)
Control group (n=30)	1.04±0.319	1.05±0.25	P=0.99
Yoga group (n=30)	0.91±0.18	0.98±0.19	P=0.638
Serum IFN-γ (pg/ml)
Control group (n=30)	4.29±0.902	1.87±0.241	P=0.012
Yoga group (n=30)	5.18±1.39	4.58±1.62*	P=0.794
Serum IFN-γ/IL-4 ratio
Control group (n=30)	4.15±3.12	1.78±0.91	P=0.008
Yoga group (n=30)	5.69±4.16	4.67±3.21*	P=0.321

Significant difference on intergroup comparison is designated by

^*if P<0.05

^**if P<0.01