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Table 5 Container and water characteristics (continuous variables) in urban and rural sites in Anapoima municipality, Colombia, October-December 2011. Both mosquito-positive and negative containers are included

From: A cross-sectional survey of Aedes aegypti immature abundance in urban and rural household containers in central Colombia

Variable

Urban

Rural

df

t-value

P

1

Water temperature (°C)

25.5 (25.1–26.0)

22.7 (22.3–23.0)

69

-10.36

< 0.00001

2

pH

7.42 (7.18–7.66)

7.72 (7.50–7.94)

69

1.87

0.033

3

Total dissolved solids, TDS (mg/l)

100.2 (85.6–114.9)

58.7 (37.9–79.4)

69

-5.14

< 0.00001

4

Electrical conductivity, EC (μS/cm)

152.6 (128.2–176.9)

91.3 (58.2–124.4)

69

-4.31

< 0.00001

5

Ammonia, NH4 (mg/l)

0.30 (0.26–0.33)

0.24 (0.20–0.28)

69

-1.71

0.046

6

Phosphate, PH4 (mg/l)

0.13 (0.10–0.17)

0.16 (0.11–0.22)

69

0.96

0.339a

7

Nitrate, NO3 (mg/l)

0.42 (0.37–0.47)

0.22 (0.16–0.29)

69

-5.49

< 0.00001

8

Dissolved oxygen, DO (mg/l)

6.25 (5.97–6.53)

5.85 (5.42–6.29

69

-1.56

0.124a

9

Total suspended solids, TSS (mg/l)

8.03 (4.80–11.25)

45.86 (11.66–82.05)

69

4.40

< 0.00001

10

Number of bacteria (log10 bacteria /ml)

5.00 (4.81–5.23)

5.06 (4.53–5.58)

33

0.25

0.804a

11

Altitude (masl)

697.3 (689.5–705.1)

1037.9 (1022.0–1053.8)

68

39.80

< 0.00001

  1. Differences in mean values (95% CI) between urban and rural sites were tested using Student’s t-test (df = degrees of freedom). The results of the t-tests of TDS, EC, NH4, PH4, NO3, and TSS are based on log10-transformed data, although the urban and rural values presented are the actual means for asier comparisons
  2. aTwo-tailed test