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. 2015 Oct 26;51(10):8431–8449. doi: 10.1002/2014WR016770

Table 3.

Multivariable Logistic Regression Model for Water Source Functionality

Contrast OR 95% CI p Value
Failure in the past year: yes versus no 0.4 (0.3–0.6) <0.0001
Pump type: Afridev versus India Mark II 1.2 (0.7–1.9) 0.9336
Pump type: Nira versus India Mark II 1.2 (0.5–2.6)
Pump type: Vergnet versus India Mark II 1.2 (0.7–2)
system age: <5 years versus 20+ years 1 (0.5–1.9) 0.1209
system age: 5–10 years versus 20+ years 0.8 (0.4–1.5)
system age: 10–15 years versus 20+ years 0.6 (0.3–1.2)
system age: 15–20 years versus 20+ years 1.5 (0.8–3)
Number of waterpoints: 1 versus 7+ 4.8 (2.3–10.1) <0.0001
Number of waterpoints: 2–3 versus 7+ 1.6 (1–2.6)
Number of waterpoints: 4–6 versus 7+ 1.5 (0.9–2.5)
Constructing organization: Hilton versus Other 1.5 (0.9–2.3) 0.1079
Identified management in the community 1.6 (1–2.7) 0.0918
Tariff: yes versus no 1.9 (1.2–3.1) 0.0105
Groundwater storage: L (<1000 mm) versus M (10,000–25,000 mm) 2.9 (1.4–5.9) 0.0219
Groundwater storage: LM (1000–10,000 mm) versus M (10,000–25,000 mm) 2.2 (0.9–5)
Borehole productivity: L (0.1–0.5 L/s) versus VL (<0.1 L/s) 0.5 (0.2–1.3) 0.2984
Borehole productivity: LM (0.5–1 L/s) versus VL (<0.1 L/s) 0.9 (0.4–2.3)
Borehole productivity: M (1–5 L/s) versus VL (<0.1 L/s) 0.6 (0.3–1.2)
Depth to groundwater: 7–25 m versus 0–7 m below ground 1.3 (0.9–2) 0.1594
Distance: 12–22 km versus 0–12 km 1.5 (0.8–2.9) 0.4673
Distance: 22–48 km versus 0–12 km 1.1 (0.5–2.4)
District: Ashanti Akim versus Ejura Sekyedumasi 1.2 (0.4–3) 0.0062
District: Atebubu versus Ejura Sekyedumasi 1.6 (0.5–4.8)
District: Kwahu East versus Ejura Sekyedumasi 0.4 (0.1–0.9)
District: Kwahu North versus Ejura Sekyedumasi 1.6 (0.6–4.5)
District: Kwahu South versus Ejura Sekyedumasi 0.2 (0.1–0.7)
District: Kwahu West versus Ejura Sekyedumasi 0.2 (0.1–0.7)
District: Mampong Municipal versus Ejura Sekyedumasi 0.2 (0.1–0.7)
District: Pru versus Ejura Sekyedumasi 0.7 (0.2–3.2)
District: Sekyere Afram Plains versus Ejura Sekyedumasi 1 (0.4–2.8)
District: Sekyere Central versus Ejura Sekyedumasi 3.3 (0.6–18.3)
District: Sekyre East versus Ejura Sekyedumasi 0.6 (0.3–1.3)
District: Sene versus Ejura Sekyedumasi 0.4 (0.1–1.5)