Background
Methods
Study design and population
Health outcome assessment
Exposure indicators
Statistical analysis
Results
Descriptive analysis
Characteristic | Study area (n = 425) | Control area (n = 341) |
---|---|---|
Demographics
| ||
Female gender (%) | 52.2 | 59.5 |
Mean age (SD) | 66.4 (11.4) | 67.1 (12.4) |
Exposure
| ||
Distance to the nearest farm (%) | ||
< 250 m | 15.1 | |
250 – 500 m | 32.5 | |
Presence of farm animals within 500 m (%) | ||
Mink | 1.9 | |
Poultry | 9.7 | |
Pigs | 19.1 | |
Goatsc | 0.2 | |
Cattle | 31.1 | |
Presence of farm animals within 1000 m (%) | ||
Mink | 10.8 | |
Poultry | 46.6 | |
Pigs | 79.1 | |
Goats | 5.7 | |
Cattle | 87.8 | |
Comorbidity
| ||
Total prevalence (%)a | 67.3 | 67.7 |
Mean number (SD)b | 1.14 (1.03) | 1.35 (1.26) |
Coexisting symptoms/infections
| ||
Total prevalence (%)a | 54.1 | 52.8 |
Mean number (SD)b | 0.79 (0.88) | 0.81 (0.95) |
Comorbid diseases and symptoms: comparison between study and control area
Study area vs. control area (OR, 99% CI) | |
---|---|
Comorbidity | |
GERD | 1.25 (0.58–2.7) |
Osteoporosis | 0.76 (0.27–2.17) |
Diabetes mellitus |
0.6 (0.37–0.99)*
|
Anxiety | 0.41 (0.16–1.04) |
Depression | 0.85 (0.44–1.62) |
Lung cancer | 1.09 (0.11–10.7) |
Hypertension | 0.94 (0.54–1.64) |
Rheumatoid arthritis | 1.34 (0.41–4.37) |
Heart disease (risk) clusterb | 0.84 (0.47–1.51) |
Total prevalencec | 1.02 (0.63–1.65) |
Numberd | 0.86 (0.69–1.05) |
Coexisting symptoms & infections | |
Pneumonia | 2.29 (0.96–5.47) |
Sleep problems | 1.16 (0.37–3.64) |
Memory/Concentration problems | 1.93 (0.36–10.2) |
Upper respiratory tract infections | 1.01 (0.46–2.22) |
Respiratory symptoms | 0.99 (0.55–1.79) |
Dizziness/Vertigo | 0.85 (0.32–2.27) |
Anemia | 1.52 (0.68–3.41) |
Allergic rhinitis/Hay fever | 0.62 (0.28–1.42) |
Total prevalencec | 1.28 (0.71–2.3) |
Numberd | 1.11 (0.8–1.55) |
Association of livestock exposure with comorbid chronic conditions
Comorbidity | < 250 mb | 250 – 500 mb |
---|---|---|
GERD | 0.94 (0.21–4.13) | 1.16 (0.41–3.33) |
Osteoporosis | 0.42 (0.05–3.37) | 1.4 (0.45–4.35) |
Diabetes mellitus | 1.28 (0.43–3.41) | 0.86 (0.39–1.89) |
Anxiety | 1.19 (0.2–6.9) | 1.32 (0.32–5.34) |
Depression | 0.35 (0.07–1.79) | 0.82 (0.31–2.13) |
Lung cancer | i.n.c | 0.38 (0.02–6.94) |
Hypertension | 0.8 (0.34–1.89) | 0.91 (0.49–1.69) |
Rheumatoid arthritis | i.n.c | 1.67 (0.35–7.92) |
Heart disease (risk) cluster* | 0.61 (0.27–1.38) | 0.85 (0.46–1.58) |
Total prevalencec | 0.48 (0.21–1.12) | 0.86 (0.44–1.65) |
Numberd | 0.73 (0.5–1.07) | 0.97 (0.75–1.25) |
Coexisting symptoms & infections | ||
Pneumonia | 2.11 (0.68–6.47) | 1.73 (0.7–4.26) |
Sleep problems | 0.61 (0.11–3.36) | 1.13 (0.38–3.32) |
Memory/Concentration problems | i.n.c | i.n.c |
Upper respiratory tract infections | 0.8 (0.31–2.1) | 0.84 (0.42–1.71) |
Respiratory symptoms | 0.78 (0.29–2.08) | 1.02 (0.51–2.06) |
Dizziness/Vertigo | 0.38 (0.02–5.85) | 0.95 (0.22–4.1) |
Anemia | 1.02 (0.23–4.58) | 1.5 (0.54–4.19) |
Allergic rhinitis/Hay fever | 0.58 (0.07–4.63) | 1.63 (0.48–5.47) |
Total prevalencec | 0.7 (0.32–1.52) | 0.92 (0.52–1.66) |
Numberd | 0.85 (0.55–1.31) | 1.04 (0.76–1.41) |
Association between livestock exposure and coexisting symptoms/infections
Presence of farm animals within 500 m (yes/no)d | ||||
---|---|---|---|---|
Comorbidity | Mink | Poultry | Pigs | Cattle |
GERD | 4.6 (0.52–40.9) | 1.47 (0.34–6.36) | 1.3 (0.4–4.19) | 0.93 (0.32–2.72) |
Osteoporosis | i.n.c | 1.13 (0.18–7.02) | 1.22 (0.29–5.0) | 0.91 (0.25–3.31) |
Diabetes mellitus | 2.26 (0.24–20.8) | 1.63 (0.56–4.69) | 1.15 (0.47–2.8) | 1.05 (0.49–2.26) |
Anxiety | i.n.c | i.n.c | 0.56 (0.08–4.09) | 1.61 (0.43–5.98) |
Depression | i.n.c | 1.64 (0.43–6.29) | 1.1 (0.37–3.28) | 0.59 (0.21–1.66) |
Lung cancer | i.n.c | 2.26 (0.12–42.7) | i.n.c | i.n.c |
Hypertension | 0.8 (0.09–7.31) | 1.04 (0.41–2.66) | 1.23 (0.6–2.53) | 1.07 (0.57–2.02) |
Rheumatoid arthritis | i.n.c | 3.02 (0.49–18.5) | 0.36 (0.02–5.67) | 0.42 (0.05–3.2) |
Heart disease (risk) cluster* | 0.6 (0.07–5.1) | 1.4 (0.55–3.59) | 1.17 (0.57–2.41) | 0.77 (0.42–1.41) |
Total prevalence b | 0.47 (0.06–3.82) | 1.14 (0.42–3.09) | 1.02 (0.48–2.19) | 0.78 (0.4–1.49) |
Number c | 1.05 (0.44–2.51) | 1.21 (0.84–1.75) | 1.00 (0.73–1.35) | 0.89 (0.68–1.15) |
Coexisting symptoms & infections | ||||
Pneumonia | 1.4 (0.08–25.5) | 1.16 (0.3–4.52) | 0.76 (0.23–2.47) |
2.48 (1.05–5.84)*
|
Sleep problems | i.n.c | 0.72 (0.1–5.19) | 0.96 (0.26–3.55) | 1.28 (0.4–4.08) |
Memory/Concentration problems | i.n.c | i.n.c | i.n.c | i.n.c |
Upper respiratory tract infections | 2.69 (0.36–19.8) | 0.54 (0.16–1.84) | 0.54 (0.21–1.39) | 0.86 (0.41–1.77) |
Respiratory symptoms | 0.67 (0.04–11.0) | 1.48 (0.54–4.1) | 0.66 (0.26–1.65) | 0.87 (0.43–1.77) |
Dizziness/Vertigo | i.n.c | 0.66 (0.04–9.88) | 0.67 (0.09–4.92) | 0.56 (0.1–3.05) |
Anemia | i.n.c | 1.88 (0.48–7.34) | 1.06 (0.3–3.67) | 1.1 (0.38–3.2) |
Allergic rhinitis/Hay fever | i.n.c | 0.89 (0.12–6.6) | 0.17 (0.01–2.47) | 1.53 (0.44–5.28) |
Total prevalence b | 0.57 (0.08–4.07) | 0.73 (0.3–1.77) |
0.42 (0.21–0.84)*
| 0.74 (0.42–1.33) |
Numberc | 0.84 (0.26–2.69) | 0.97 (0.6–1.58) | 0.66 (0.44–1.01) | 1.03 (0.76–1.4) |
Presence of farm animals within 1000 m (yes/no) | |||||
---|---|---|---|---|---|
Comorbidity | Mink | Poultry | Pigs | Goats | Cattle |
GERD | 1.79 (0.46–6.85) | 1.51 (0.56–4.06) | 0.57 (0.19–1.69) | 1.02 (0.14–7.57) | 0.62 (0.16–2.38) |
Osteoporosis | 0.61 (0.07–5.05) | 0.87 (0.26–2.88) | 2.57 (0.45–14.8) | 0.52 (0.02–10.43) | 1.56 (0.2–12.1) |
Diabetes mellitus | 1.33 (0.44–3.97) | 0.92 (0.45–1.87) | 0.85 (0.36–2.02) | 0.48 (0.07–3.44) | 1.3 (0.39–4.29) |
Anxiety | 1.08 (0.14–8.06) | 0.66 (0.17–2.53) | 0.3 (0.08–1.11) |
8.18 (1.5–44.7) *
| 0.69 (0.12–3.79) |
Depression | 0.39 (0.05–2.68) | 0.76 (0.31–1.84) | 0.58 (0.22–1.49) | i.n.c | 0.48 (0.16–1.41) |
Lung cancer | i.n.c | 0.28 (0.01–5.19) | 0.82 (0.04–15.5) | i.n.c | i.n.c |
Hypertension | 1.14 (0.43–3.03) | 0.87 (0.48–1.6) | 1.11 (0.54–2.28) | 1.49 (0.42–5.32) | 1.18 (0.48–2.91) |
Rheumatoid arthritis | i.n.c | 1.35 (0.3–6.0) | 4.11 (0.24–71.1) | 1.72 (0.09–31.0) | 1.82 (0.11–29.6) |
Heart disease (risk) cluster* | 1.41 (0.58–3.43) | 0.61 (0.35–1.06) | 1.31 (0.67–2.59) | 1.24 (0.35–4.35) | 1.21 (0.5–2.93) |
Total prevalenceb | 1.11 (0.41–3.0) | 0.56 (0.31–1.02) | 0.98 (0.46–2.1) | 1.77 (0.4–7.82) | 1.03 (0.41–2.6) |
Numberc | 1.11 (0.77–1.62) | 0.87 (0.69–1.1) | 0.95 (0.7–1.28) | 1.15 (0.72–1.85) | 1.1 (0.75–1.61) |
Coexisting symptoms & infections | |||||
Pneumonia | 0.94 (0.2–4.32) | 1.04 (0.42–2.58) | 1.00 (0.35–2.86) | 3.65 (0.96–13.8) | 1.05 (0.27–4.04) |
Sleep problems | 0.87 (0.15–5.02) | 0.56 (0.18–1.71) | 2.23 (0.47–10.5) | 1.92 (0.19–19.7) | 1.39 (0.24–7.79) |
Memory/Concentration problems | i.n.c | 0.54 (0.09–3.19) | 2.66 (0.15–45.8) | 3.13 (0.22–43.2) | 0.41 (0.04–3.95) |
Upper respiratory tract infections | 1.3 (0.43–3.98) | 1.07 (0.55–2.11) | 0.66 (0.3–1.44) | 0.72 (0.15–3.4) | 1.06 (0.39–2.88) |
Respiratory symptoms | 0.81 (0.26–2.49) | 1.66 (0.87–3.19) | 0.84 (0.39–1.81) | 1.54 (0.42–5.62) | 0.63 (0.25–1.58) |
Dizziness/Vertigo | 1.34 (0.18–10.0) | 3.33 (0.72–15.4) | 1.08 (0.2–5.93) | 3.3 (0.41–26.5) | 2.06 (0.14–30.6) |
Anemia | 0.83 (0.14–4.98) | 1.04 (0.39–2.8) | 0.78 (0.22–2.75) | 1.75 (0.3–10.1) | 0.45 (0.11–1.69) |
Allergic rhinitis/Hay fever | 0.38 (0.02–6.29) | 1.16 (0.36–3.72) | 2.54 (0.45–14.3) |
5.71 (1.11–29.3) *
| 1.14 (0.2–6.43) |
Total prevalenceb | 0.84 (0.34–2.09) | 1.24 (0.71–2.18) | 0.89 (0.44–1.8) | 1.39 (0.41–4.63) | 0.79 (0.34–1.84) |
Numberc | 0.86 (0.52–1.41) | 1.17 (0.88–1.55) | 0.95 (0.67–1.37) |
1.69 (1.03–2.77) *
| 0.86 (0.57–1.31) |