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Research Article

Table 1

Results of univariate and multivariate logistic regression analyses of Toxoplasma gondii seropositivity of blood donors in Tunisia.

Risk factors N (positive) Seroprevalence in % (95% CI) Univariable
Multivariable
OR (95% CI) p-value OR (95% CI) p-value
Region
 Gafsa 400 (163) 40.75 (35.93–45.57)
 Monastir 400 (192) 48.00 (43.10–52.90) 1.34 (1.01–1.77) 0.0390 1.72 (1.26–2.35) 0.0010
Gender
 Male 636 (282) 44.34 (40.48–48.20)
 Female 164 (73) 44.51 (36.91–52.12) 1.00 (0.71–1.42) 0.968
Age (years)
 18–25 290 (99) 34.14 (28.68–39.60)
 26–35 240 (140) 58.33 (52.10–64.57) 2.70 (1.90–3.84) <0.0001 2.79 (1.93–4.04) <0.0001
 36–45 175 (63) 36.00 (28.89–43.11) 1.08 (0.73–1.61) 0.6831 1.04 (0.69–1.58) 0.8340
 >45 95 (53) 55.79 (45.80–65.78) 2.43 (1.52–3.90) 0.0002 0.60 (0.39–0.93) 0.0003
Residence area
 Rural 111 (60) 54.05 (44.78–63.33)
 Urban 689 (295) 42.82 (39.12–46.51) 0.64 (0.42–0.95) 0.0280 0.30 (0.13–0.71) 0.0064
Blood group
 A 216 (99) 45.83 (39.19–52.48)
 AB 38 (22) 57.89 (42.20–73.59) 1.62 (0.81–3.26) 0.1724 1.90 (0.91–3.93) 0.086
 B 101 (50) 49.50 (39.75–59.26) 1.16 (0.72–1.86) 0.5418 1.14 (0.69–1.88) 0.600
 O 445 (184) 41.35 (36.77–45.92) 0.83 (0.60–1.16) 0.2746 0.95 (0.67–1.35) 0.797
RhD
 Positive 725 (321) 44.28 (40.66–47.89)
 Negative 75 (34) 45.33 (34.07–56.60) 1.04 (0.64–1.68) 0.861
Education level
 Uneducated 18 (10) 55.56 (32.60–78.51)
 Primary 136 (68) 50.0 (41.60–58.40) 0.80 (0.30–2.15) 0.6582 0.63 (0.22–1.85) 0.403
 Secondary 321 (146) 45.48 (40.04–50.93) 0.67 (0.26–1.73) 0.4068 0.50 (0.18–1.43) 0.198
 University 325 (131) 40.31 (34.97–45.64) 0.54 (0.21–1.40) 0.2066 0.51 (0.18–1.50) 0.224
Level of income
 Low 71 (35) 49.30 (37.67–60.93)
 Intermediate and high 729 (320) 43.90 (40.29–47.50) 1.24 (0.76–2.02) 0.383
Consumption of undercooked meat
 No 698 (298) 42.69 (39.02–46.36)
 Yes 102 (57) 55.88 (46.25–65.52) 1.70 (1.12–2.58) 0.0130 1.33 (0.85–2.10) 0.242
Consumption of unwashed raw vegetables and fruits
 No 361 (150) 41.55 (36.47–46.63)
 Yes 439 (205) 46.70 (42.03–51.36) 1.23 (0.93–1.63) 0.1450 0.91 (0.65–1.29) 0.607
Gardening or practice of agriculture
 No 488 (202) 41.39 (37.02–45.76)
 Yes 312 (153) 49.04 (43.49–54.59) 1.36 (1.02–1.81) 0.0340 1.15 (0.84–1.58) 0.383
Contact with cats
 No 557 (242) 43.45 (39.33–47.56)
 Yes 243 (113) 46.50 (40.23–52.77) 1.13 (0.83–1.53) 0.424
Hand washing before eating
 No 214 (122) 57.01 (50.38–63.64)
 Yes 586 (233) 39.76 (35.80–43.72) 0.50 (0.36–0.68) <0.0001 0.56 (0.40–0.79) 0.001
Marital status
 Single 437 (180) 41.19 (36.58–45.80)
 Married 363 (175) 48.21 (43.07–53.35) 1.33 (1.00–1.76) 0.0470 1.24 (0.82–1.89) 0.304
Occupation
 Students 179 (68) 37.99 (30.88–45.10)
 Other business 223 (112) 50.22 (43.66–56.79) 1.65 (1.10–2.46) 0.0145 0.72 (0.42–1.26) 0.254
 Unemployed 163 (62) 38.04 (30.58–45.49) 1.00 (0.65–1.55) 0.9927 0.57 (0.31–1.04) 0.067
 Employed 235 (113) 48.09 (41.70–54.47) 1.51 (1.02–2.25) 0.0406 0.74 (0.41–1.33) 0.319

N, number tested; OR, odds ratio; CI, confidence interval.

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