Table 3.

Internal consistency of Swahili PHQ-9.

	Cronbach's alpha (95% CI)	Macdonald's Omega (95% CI)
Overall	0.84 (0.82 - 0.86)	0.84 (0.82 - 0.87)
Group
Adults from the community	0.90 (0.87 - 0.92)	0.90 (0.87 - 0.93)
Adults living with HIV	0.81 (0.79 - 0.84)	0.81 (0.78 - 0.84)
Sex
Females	0.83 (0.81 - 0.85)	0.84 (0.82 - 0.86)
Males	0.86 (0.78 - 0.90)	0.86 (0.77 - 0.91)
Age category
Young adults (18 - 35 years)	0.85 (0.82 - 0.88)	0.85 (0.81 - 0.88)
Middle-age adults (36 - 49 years)	0.83 (0.80 - 0.86)	0.84 (0.81 - 0.87)
Elderly adults (50 - 80 years)	0.83 (0.78 - 0.86)	0.84 (0.77 - 0.88)

Notes. 95% CI - 95% Confidence Interval.