Table II.

Influence of type of diet on the health status of people living with rheumatoid arthritis

Study/Type of diet	Publication year	Number of participants	Study with control group	Mediterranean diet	Vegetarian diet	Vegan diet	Elementary diet	Periodical starvations
Matsumoto Y, Sugioka Y, Tada M, et al. [42]	2018	208	Yes	+	n/a	n/a	n/a	n/a
Sköldstam L, Hagfors L, Johansson G [41]	2003	26	Yes	+	n/a	n/a	n/a	n/a
McDougall J, Bruce B, Spiller G, et al. [38]	2002	24	No	n/a	n/a	+	n/a	n/a
Nenonen MT, Helve TA, Rauma AL, et al. [13]	1998	22	Yes	n/a	n/a	+	n/a	+
Kavanaghi R, Workman E, Nash P, et al. [19]	1995	24	Yes	n/a	n/a	n/a	+	n/a
Kjeldsen-Kragh J, Haugen M, Borchgrevink CF, et al. [10]	1991	27	Yes	n/a	+	n/a	n/a	+
Hafstrom I, Ringertz B, Gyllenhammar H, et al. [3]	1988	14	Yes	n/a	n/a	n/a	n/a	+
Skoldstam L, Larsson L, Lindstrom F [7]	1979	16	Yes	n/a	0	n/a	n/a	+

Source: authors’ statement based on literature

n/a – not available; + positive influence; – negative influence (exacerbation of symptoms); 0 – without influence