Table 1.

Organ weights (mg) in unstressed and stressed mice. Values shown are means ± SEMs for 10–15 mice. Stressing was by immobilization for 5 h per day for 14 consecutive days. Asterisks indicate a statistically significant difference (***P ≤ 0.001) between the two groups.

	Unstressed mice	Stressed mice	Fold decrease
Thymus	68.7 ± 4.3	33.3 ± 2.4***	0.5
Spleen	74.5 ± 6.2	38.5 ± 1.8***	0.5
Lymph nodes	43.7 ± 2.3	19.1 ± 1.0***	0.4