| Survey year AOR (95% CI) | ||||||
---|---|---|---|---|---|---|---|
Determinants | 1998 | 2008 | 2010/2011 | 2012 | 2014/2015 | 2016 | 2017 |
Age | |||||||
 15–24 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
 25–34 | 3.11*** | 2.54*** | 2.83*** | 3.19*** | 3.08*** | 2.99*** | 3.51*** |
(2.60–3.72) | (2.02–3.18) | (2.27–3.54) | (2.67–3.82) | (2.59–3.65) | (2.39–3.73) | (3.00–4.11) | |
 35–49 | 6.60*** | 5.35*** | 5.24*** | 6.64*** | 5.65*** | 5.98*** | 5.28*** |
(5.39–8.09) | (4.32–6.63) | (4.14–6.63) | (5.44–8.11) | (4.72–6.75) | (4.54–7.87) | (4.52–6.17) | |
Population group | |||||||
 Non-Black African | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
 Black African | 1.69*** | 1.04 | 1.39 | 1.34 | 1.25 | 1.42* | 1.12 |
(1.35–2.11) | (0.73–1.48) | (0.95–2.04) | (0.98–1.83) | (0.94–1.67) | (1.01–2.00) | (0.89–1.41) | |
Education | |||||||
 No schooling/Primary | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
 Secondary | 0.97 | 1.30* | 1.43** | 1.78*** | 1.36** | 1.25 | 1.30* |
(0.82–1.15) | (1.05–1.62) | (1.14–1.79) | (1.36–2.32) | (1.11–1.66) | (0.91–1.72) | (1.03–1.64) | |
 Tertiary | 0.56*** | 1.33 | 1.39 | 1.71** | 1.70*** | 1.10 | 1.28 |
(0.41–0.76) | (0.93–1.88) | (0.99–1.96) | (1.21–2.42) | (1.24–2.33) | (0.70–1.73) | (0.95–1.73) | |
Area of residence | |||||||
 Rural | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
 urban | 1.25* | 1.15 | 1.16 | 1.10 | 0.92 | 0.92 | 0.98 |
(1.02–1.53) | (0.90–1.45) | (0.92–1.47) | (0.91–1.34) | (0.76–1.11) | (0.73–1.16) | (0.81–1.19) | |
 Current smoking status | 0.61*** | 0.63** | 0.81 | 0.86 | 0.73 | 0.92 | 0.62** |
(0.48–0.79) | (0.45–0.88) | (0.48–1.39) | (0.49–1.52) | (0.50–1.07) | (0.60–1.42) | (0.47–0.84) | |
Socioeconomic quintiles | |||||||
 1 (poorest) | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
 2 (poor) | 1.12 | 1.07 | 1.47** | 1.24 | 1.16 | 1.32 | 1.19 |
(0.84–1.49) | (0.82–1.39) | (1.13–1.91) | (0.99–1.55) | (0.93–1.44) | (0.99–1.77) | (0.98–1.43) | |
 3 (middle) | 1.15 | 1.16 | 1.35 | 0.96 | 1.54*** | 1.59** | 1.30* |
(0.87–1.53) | (0.87–1.54) | (0.99–1.83) | (0.74–1.24) | (1.24–1.91) | (1.18–2.13) | (1.03–1.63) | |
 4 (rich) | 1.27 | 1.36 | 1.26 | 1.32 | 1.65*** | 1.56* | 1.66*** |
(0.92–1.75) | (0.99–1.87) | (0.91–1.75) | (0.99–1.76) | (1.26–2.18) | (1.09–2.22) | (1.30–2.12) | |
 5 (richest) | 1.35 | 1.24 | 1.38 | 1.40 | 1.39* | 1.62* | 1.39* |
(0.95–1.94) | (0.79–1.96) | (0.92–2.07) | (0.98–2.02) | (1.00–1.92) | (1.06–2.46) | (1.04–1.87) | |
 Constant | 0.21*** | 0.35*** | 0.25*** | 0.21*** | 0.29*** | 0.30*** | 0.34*** |
(0.15–0.30) | (0.22–0.54) | (0.15–0.41) | (0.14–0.33) | (0.20–0.43) | (0.19–0.50) | (0.24–0.48) | |
 Observations | 4993 | 5785 | 6286 | 7594 | 9034 | 3262 | 9342 |