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Table 3 Comparison of observed handwashing during the latter 210 minutes of observation, compared to expected handwashing based on observed behavior during the first 90 minutes of 5-hour structured observations, rural Bangladesh, 2007

From: Impact of duration of structured observations on measurement of handwashing behavior at critical times

Variables

Observed in the first 90 minutes (n = 49)

Expected in the remaining 210 minutes

Observed in the remaining 210 minutes (n = 49)

P-value

Mean number of events (all critical times)

1.84 (SE 0.18)

4.29 (SE 0.43)

4.84 (SE 0.31)

0.292

Events when hands were washed*

1.31 (SE 0.18)

3.05 (SE 0.41

3.82 (SE 0.27)

0.126

Events when hands were washed with soap

0.24 (SE 0.07)

0.57 (SE 0.16)

0.55 (SE 0.11)

0.917

Mean number of before food preparation events:

    

All events

0.22 (SE 0.07)

0.52 (SE 0.16)

0.80 (SE 0.09)

0.171

Events when hands were washed*

0.20 (SE 0.07)

0.48 (SE 0.15)

0.73 (SE 0.09)

0.179

Events when hands were washed with soap

0.02 (SE 0.02)

0.05 (SE 0.05)

0.02 (SE 0.02)

0.605

Mean number of before food serving events:

    

All events

0.24 (SE 0.06)

0.57 (SE 0.14)

1.08 (SE 0.14)

0.017

Events when hands were washed*

0.22 (SE 0.06)

0.52 (SE 0.14)

1.00 (SE 0.13)

0.016

Events when hands were washed with soap

0.02 (SE 0.02)

0.05 (SE 0.05)

0.12 (SE 0.05)

0.283

Mean number of before eating events:

    

All events

0.31 (SE 0.09)

0.71 (SE 0.21)

1.00 (SE 0.11)

0.254

Events when hands were washed*

0.26 (SE 0.07)

0.62 (SE 0.16)

0.75 (SE 0.08)

0.481

Events when hands were washed with soap

0.02 (SE 0.02)

0.05 (SE 0.05)

0.04 (SE 0.03)

0.904

Mean number of events before feeding a child:

    

All events

0.90 (SE 0.11)

2.09 (SE 0.27)

1.45 (SE 0.17)

0.045

Events when hands were washed*

0.45 (SE 0.10)

1.05 (SE 0.23)

0.86 (SE 0.14)

0.483

Events when hands were washed with soap

0.14 (SE 0.06)

0.24 (SE 0.10)

0.14 (SE 0.06)

0.412

Mean number of defecation events:

    

All events

0.0

0.0

0.06 (SE 0.03)

0.083

Events when hands were washed*

0.0

0.0

0.06 (SE 0.03)

0.083

Events when hands were washed with soap

0.0

0.0

0.06 (SE 0.034)

0.083

Mean number of events of cleaning a child who defecated:

All events

0.16 (SE 0.05)

0.38 (SE 0.12)

0.45 (SE 0.10)

0.655

Events when hands were washed*

0.16 (SE 0.05)

0.38 (SE 0.12)

0.41 (SE 0.09)

0.860

Events when hands were washed with soap

0.08 (SE 0.04)

0.19 (SE 0.09)

0.16 (SE 0.12)

0.816

  1. * Washed hands with water and with or without soap, ash or mud.