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. 2019 Mar 22;14(3):e0214129. doi: 10.1371/journal.pone.0214129

Table 2. Disease and medication-related variables regarding to adherence rate.

Variable Overall Low adherence Medium/High adherence P
Disease duration in years 5.89±4.87 5.51±4.06 6.27±5.54 .7431
    < 1 year 20 (7.7) 10 (7.8) 10 (7.7) .9552
    1–5 years 125 (48.3) 63 (48.8) 62 (47.7)
    ≥ 5 years 114 (44.0) 56 (43.4) 58 (44.6)
Number of oral 5-ASA / day 3.69±1.78 3.78±1.74 3.61±1.82 .5461
    1–5 205 (79.2) 100 (77.5) 105 (80.8) .5202
    ≥ 6 54 (20.8) 29 (22.5) 25 (19.2)
Times of oral 5-ASA
    Once a day 124 (47.9) 63 (48.8) 61 (46.9) .7582
    Twice or 3 times a day 135 (52.1) 66 (51.2) 69 (53.1)
5-ASA suppository
    Yes 71 (27.4) 36 (27.9) 35 (26.9) .8592
    No 188 (72.6) 93 (72.1) 95 (73.1)
Anti-TNF
    Yes 40 (15.4) 19 (14.7) 21 (16.2) .7512
    No 219 (84.6) 110 (85.3) 109 (83.8)
Azathioprine use
    Yes 49 (18.9) 22 (17.1) 27 (20.8) .4452
    No 210 (81.1) 107 (82.9) 103 (79.2)
Types of 5-ASA
    Mezavant 62 (23.9) 24 (18.6) 38 (29.2) .2562
    Pentasa slow 97 (37.5) 51 (39.5) 46 (35.4)
    Asacol dr 76 (29.3) 41 (31.8) 35 (26.9)
    Colazal 24 (9.3) 13 (10.1) 11 (8.5)
Disease extent at diagnosis
    Proctitis 90 (34.7) 47 (36.4) 43 (33.1) .7102
    Left side colitis 111 (42.9) 52 (40.3) 59 (45.4)
    Extensive colitis 58 (22.4) 30 (23.3) 28 (21.5)
Presence of comorbidities
    Yes 69 (26.6) 29 (22.5) 40 (30.8) .1312
    No 190 (73.4) 100 (77.5) 90 (69.2)
Number of UC flare up in past year 0.45±0.93 0.44±0.90 0.46±0.97 .9101
    0 192 (74.1) 95 (73.6) 97 (74.6) .9232
    1–2 52 (20.1) 27 (20.9) 25 (19.2)
    ≥ 3 15 (5.8) 7 (5.4) 8 (6.2)

Values are either mean±SD or frequency with percentage in parentheses.

1 P values were derived from Mann-Whitney’s U test.

2 P values were derived from chi-square test.

Shapiro-Wilk’s test was employed for test of normality assumption.