County

School category

Intervention Epoch

N

Mean

SD

df

t-value

p-value

Kajiado

All schools

Before

139

2.86

.69

139

24.149

.000

After

139

1.59

.44

Migori

All schools

Before

91

2.18

1.09

90

6.625

.000

After

91

1.58

.49

Mombasa

All schools

Before

134

2.98

.60

133

20.686

.000

After

134

1.79

.49

Elgeyo Marakwet

All schools

Before

76

2.12

.91

75

6.511

.000

After

76

1.44

.50

Nairobi

All schools

Before

69

3.21

.55

68

25.430

.000

After

69

1.65

.60