Table 2. Measure of internal consistency using Cronbach’s alpha and Omega coefficient.

	Mean MDI	Cronbach’s Alpha	Omega (95% CI)
Overall	7.25	0.83	0.82 (0.81, 0.83)
Sex
Male	6.77	0.81	0.80 (0.79, 0.82)
Female	7.79	0.85	0.83 (0.82, 0.85)
Age
13–14	5.43	0.84	0.83 (0.81, 0.86)
15–19	7.51	0.82	0.81 (0.79, 0.83)
20–24	8.42	0.84	0.82 (0.80, 0.85)
Language
Swahili	7.22	0.84	0.82 (0.81, 0.84)
English	6.59	0.75	0.76 (0.62, 0.89)
Giriama	8.13	0.75	0.72 (0.61, 0.83)