Table 2 Mixed-Effects regression model on the effect of the intervention on self-esteem

Menstrual Knowledge

-0.16 (-0.36, 0.04)

0.120

Cultural attitudes

 No (ref)

 Yes

-1.00 (-2.19, 0.19)

0.099

Group x Menstrual knowledge

 Usual care x Menstrual knowledge (ref)

 YDA x Menstrual knowledge

0.14 (-0.10, 0.39)

0.255

 YDA + MFG x Menstrual knowledge

-0.01 (-0.28,0.26)

0.928

Group x Cultural attitudes

 Usual care x Cultural attitudes (ref)

 YDA x Cultural attitudes

0.14 (-1.34, 1.61)

0.856

 YDA + MFG x Cultural attitudes

1.57 (0.07, 3.07)

0.040

Group: χ²(df)

1.39 (2)

0.500

 Usual care (ref)

 YDA

-0.24 (-1.74, 1.26)

0.753

 YDA + MFG

-1.08 (-2.53, 0.36)

0.142

Time (Assessment points): χ²(df)

102.07 (2)

< 0.001

 Baseline (ref)

 12 months

0.06 (-0.77, 0.89)

0.886

 24 months

1.61 (0.67, 2.55)

0.001

Group x time: χ²(df)

12.99 (4)

0.011

 Usual care x baseline (ref)

 YDA x 12 months

0.54 (-0.60, 1.69)

0.351

 YDA + MFG x 12 months

1.29 (0.19, 2.38)

0.021

 YDA x 24 months

0.33 (-0.83, 1.48)

0.582

 YDA + MFG x 24 months

1.58 (0.45, 2.71)

0.006

Constant

35.07 (33.94, 36.20)

< 0.001

Random effects

School variance

0.107 (0.009 to 1.210)

Participant variance

3.670 (2.773 to 4.856)

School level ICC

0.007 (0.001 to 0.704)

Participant level ICC

0.237 (0.181 to 0.303)

Number of participants

1260

No. of observations

1896