Table 2.

Characteristics of preventive studies (n = 66).

Characteristics of study	Ayurveda (n = 43)	Yoga & Naturopathy (n = 1)	Unani (n = 4)	Siddha (n = 2)	Homeopathy (n = 9)	Others (n = 3)	Collaborative (n = 4)
Study arms
Single arm	16	0	0	0	3	1	2
Double arm	26	1	2	2	5	2	2
Multi arm	1	0	2	0	1	0	0
Sample size
≤30	3	0	0	0	1	1	0
31–100	6	1	1	0	0	0	1
101–1000	17	0	1	0	4	2	3
>1001	17	0	2	2	4	0	0
Study Population
Healthy volunteers	7	0	0	0	1	0	1
High Risk Individuals	36	1	4	2	8	3	3
Type of Intervention (where applicable)
Single drug formulation	16	0	0	0	4	1	0
Multi drug formulation	13	0	1	1	2	1	0
Multi-formulation regime	14	0	3	1	3	1	3
Non-Pharmacological	0	1	0	0	0	0	1
Use of comparators
AYUSH vs. CCa	16	0	2	2	0	1	2
AYUSH vs. Placebo/No Treatment	7	1	2	0	5	1	0
AYUSH vs. nutritional/	2	0	0	0	1	0	0
dietary items
AYUSH + CC vs.CC or Placebo + CC	2	0	0	0	0	0	0
Treatment duration
≤7 days	1	0	0	0	3	0	0
>7 days to ≤15 days	1	0	2	1	1	2	1
>15 days to ≤30 days	17	0	1	0	0	1	0
>30 days	12	0	0	0	1	0	2
Not Specified	12	1	1	1	4	0	1
Primary Outcomes
Incidence of infection	38	1	4	2	9	3	4
Incidence of infection & AYUSH specific parameters	4	0	0	0	0	0	0
Acceptability of Intervention	1	0	0	0	0	0	0
Study Duration
≤3 months	20	1	2	0	4	0	1
>3 moths & ≤ 6 months	15	0	2	2	5	3	1
>6 months & ≤ 1 year	6	0	0	0	0	0	2
>1 year	2	0	0	0	0	0	0

^aCC: Conventional Care.