Table 2.

The comparison of the average of general (overall) severity of the symptoms of premenstrual syndrome before treatment in students of the dormitories of Jahrom University in 2013

Symptoms of PMS	Vitamin B1 group	Placebo group	P
	Average of score + standard deviation	Average of score + standard deviation
General (overall) severity of the symptoms of PMS	47.49 ± 0.34	47.40 ± 0.54	NS
Mental symptoms severity of PMS	42.52 ± 0.02	42.59 ± 0.07	NS
Physical symptoms severity of PMS	34.19 ± 0.72	35.27 ± 0.98	NS