Variables | Categories | Mean ± SD | p value |
---|---|---|---|
Knowledge scores | At baseline | 2.45 ± 1.12 | < 0.001 |
At 1 year | 3.79 ± 1.12 | ||
At one and a half years | 4.07 ± 0.98 | ||
Behavior scores | At baseline | 1.56 ± 0.90 | < 0.001 |
At 1 year | 3.60 ± 1.21 | ||
At one and a half years | 3.24 ± 1.31 |