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Table 2 Symptoms reported at follow-up by questionnaire and association with case status, Sweden 2013

From: Persisting post-infection symptoms 2 years after a large waterborne outbreak of Cryptosporidium hominis in northern Sweden

Symptom

Total

0–5 years

6–15 years

16–40 years

41–65 years

> 65 years

n = 559

n = 48

n = 54

n = 114

n = 200

n = 143

Cases

n (%)

Non-cases

n (%)

ORa (95% CI)

ORb (95% CI)

ORb (95% CI)

ORb (95% CI)

ORb (95% CI)

ORb (95% CI)

Weight loss

9 (4)

14 (4)

0.9 (0.4–2.2)

0.6 (0.1–5.6)

–

1.7 (0.4–8.4)

0.9 (0.2–3.8)

–

Watery diarrhea

36 (17)

26 (8)

2.0 (1.1–3.4)

1.4 (0.3–5.5)

4.5 (0.4–44.5)

1.6 (0.6–4.2)

2.8 (1.0–7.5)

1.3 (0.1–13.1)

Diarrhea

53 (25)

45 (13)

1.9 (1.7–2.9)

0.9 (0.3–3.3)

0.9 (0.2–4.1)

2.4 (1.0–5.8)

2.1 (1.0–4.6)

3.9 (1.1–14.3)

Abdominal pain

61 (29)

43 (13)

2.3 (1.5–3.7)

4.3 (0.9–22)

1.4 (0.4–4.5)

3.1 (1.3–7.1)

1.8 (0.8–4.1)

4.3 (1.2–14.7)

Stiff joints

44 (21)

38 (11)

2.8 (1.7–4.6)

–

–

4.0 (1.1–14.1)

2.1 (1.1 –4.4)

3.1 (1.2–7.9)

Joint pain

48 (23)

44 (13)

2.2 (1.5–3.7)

–

0.5 (0.1–2.5)

13.2 (2.8–61.9)

1.8 (0.9–3.6)

2.1 (0.8–5.5)

Loss of appetite

30 (14)

39 (11)

1.0 (0.6–1.7)

0.4 (0.1–1.7)

1.3 (0.3–6.7)

1.5 (0.6–3.7)

1.0 (0.4–2.6)

–

Fatigue

80 (38)

84 (25)

1.7 (1.1–2.5)

1.2 (0.3–4.4)

0.8 (0.2–2.8)

3.0 (1.4–6.5)

2.0 (1.1–3.7)

0.8 (0.3–2.5)

Nausea

60 (29)

49 (15)

2.0 (1.3–3.0)

1.2 (0.3–4.7)

0.8 (0.2–3.2)

2.7 (1.2–6.0)

2.0 (0.9–4.4)

2.2 (0.5–9.9)

Headache

95 (45)

82 (24)

2.4 (1.7–3.5)

3 (0.5–17.1)

4 (1.3–13.1)

3.2 (1.4–7.3)

2.4 (1.3–4.4)

1.0 (0.3–3.0)

Joint discomfort

40 (19)

44 (13)

2.0 (1.2–3.3)

–

–

6.1 (1.8–20.3)

1.6 (0.8–3.3)

1.7 (0.6–4.5)

Ocular pain

38 (18)

42 (12)

1.5 (0.9–2.4)

0.7 (0.1–5.1)

1.1 (0.2–4.7)

1.4 (0.6–3.7)

1.4 (0.6–3.1)

2.8 (0.9–8.8)

Swollen joints

13 (6)

20 (6)

1.2 (0.5–2.6)

–

–

7.7 (0.9–68.0)

0.5 (0.1–1.5)

2.4 (0.6–9.1)

Vomiting

34 (16)

26 (8)

1.6 (0.9–2.8)

1.0 (0.3–3.4)

1.7 (0.3–10.3)

1.5 (0.6–3.7)

1.5 (0.4–5.5)

–

  1. Italics indicates significant at 0.05 level
  2. aAdjusted for age and sex
  3. bAdjusted for sex
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BMC Research Notes

ISSN: 1756-0500

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