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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 (0.23.8)
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 (1.07.5) 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