Table 2. Dropout rate and adverse effects of Rhodiola crenulata.

Groups	Rhodiola (n = 38)	Placebo (n = 19)	p
Dropout, n (%)	5 (13.1)	1 (5.3)	0.65
Acute exacerbation, n	1 (2.6)	0 (0)
Poor appetite/upset, n	1 (2.6)	1 (5.3)
Loss to follow-up, n	2 (5.3)	0 (0)
No effect, n	1 (2.6)	0 (0)
Acute exacerbation	1 (2.6)	3 (15.8)	0.1
Common cold	13 (34.2)	4 (21)	0.3
Cough	7 (18.4)	2 (10.5)	0.7
Dyspnea	1 (2.6)	1 (5.3)	1
Upper airway dryness	1 (2.6)	0 (0)	1
Functional GI problems	5 (13.1)	1 (5.3)	0.65
Dizziness and giddiness	1 (2.6)	0 (0)	1
Gout	0 (0)	1 (5.3)	0.33
Severe adverse effect	0 (0)	0 (0)	-
Any side effect	21 (55.3)	11 (57.9)	0.85

For definitions of acute exacerbation, please refer to text. GI: gastrointestinal. Chi square or Fisher’s exact test was used for comparisons.