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Table 3 Ordinary least squares regression models of treatment effects on observed handwashing (yes = 1, no = 0) among children during the snack tests

From: Washing with hope: evidence of improved handwashing among children in South Africa from a pilot study of a novel soap technology

 

1

2

3

4

5

6

Washed at Snack 1

Washed at Snack 1

Washed at Snack 2

Washed at Snack 2

Washed at Snack 1&2

Washed at Snack 1&2

Treatment: HOPE SOAP©

0.02a

0.04

0.11

0.06

0.10

0.10

(−0.13–0.18)

(−0.12–0.20)

(−0.06–0.29)

(−0.11–0.23)

(−0.08–0.27)

(−0.07–0.27)

Controls

No

Yes

No

Yes

No

Yes

Observations

230

228

188

187

188

187

R-squared

0.00

0.12

0.01

0.17

0.01

0.13

  1. aBeta coefficient presented followed by 95% confidence intervals in parentheses
  2. *** p < 0.01, ** p < 0.05, * p < 0.1
  3. Additional controls included but not reported: female, age, household size, number of children in households (HH), asset ownership, piped water available in HH, HH limits water use; soap observed in HH; HH received hygiene training; caregiver depressed/anxious; child had difficulty opening tap; child cannot reach taps; child’s hands too small for soap. The full model, with coefficients for all control variables, is presented in Additional file 1: Table S1