. 2019 Jan 24;14(1):e0211120. doi: 10.1371/journal.pone.0211120

Table 8. Comparison of sociodemographic data between patients with and without comorbidities.

	Pw/oSI		PwSI		p-value
N	68		77
	N (%)		N (%)
Age (Years)	19–61^R	40.2 (11.0)^a	22–68^R	45.5 (11.2)^a	0.005^t
≤ 29	14 (20.6)		5 (6.5)
30–39	21 (30.9)		23 (29.9)
40–49	17 (25.0)		18 (23.4)
50–59	15 (22.1)		23 (29.9)
≥ 60	1 (1.5)		8 (10.4)
Gender					0.259^Fi
Female	47 (69.1)		60 (77.9)
Male	21 (30.9)		17 (22.1)
School years	8–13^R	11.0 (1.4)^a	9–16^R	10.9 (1.3)^a	0.476^t
Educational level					0.276^Chi
No training	3 (4.4)		0 (0.0)
Skilled worker	43 (63.2)		48 (62.3)
Technical college	4 (5.9)		4 (5.2)
University	18 (26.5)		25 (32.5)
Employment status					0.701^Chi
In training	3 (4.4)		1 (1.3)
Employed	36 (52.9)		39 (50.6)
Unemployed	2 (2.9)		2 (2.6)
Retiree	24 (35.3)		33 (42.9)
Other	3 (4.4)		2 (2.6)
Partnership					0.344^Fi
Yes	48 (70.6)		60 (77.9)
No	20 (29.4)		17 (22.1)
Place of residence					0.473^Chi
Rural community	17 (25.0)		22 (28.6)
Provincial town	15 (22.1)		11 (14.3)
Medium-sized town	5 (7.4)		10 (13.0)
City	31 (45.6)		34 (44.2)
Number of children	0–3^R	1^b	0–3^R	1^b	0.904^U
0	24 (35.3)		18 (23.4)
1	15 (22.1)		34 (44.2)
2	25 (36.8)		20 (26.0)
3	4 (5.9)		5 (6.5)
Number of siblings	0–8^R	1^b	0–13^R	1^b	0.296^U
0	4 (5.9)		11 (14.3)
1	40 (58.8)		43 (55.8)
≥ 2	24 (35.3)		23 (29.9)

MS, multiple sclerosis; N, number of patients; PwP, patients with polypharmacy; PwSI, patients with secondary illnesses; Pw/oP, patients without polypharmacy; Pw/oSI, patients without secondary illnesses; R, range.

^a mean value (standard deviation);

^b median;

^Chi Chi-square test;

^Fi Fisher’s exact test;

^R range;

^t two-sample two-tailed Student’s t-test;

^U Mann-Whitney U test.