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Table 2 Simple multinomial regression with cannabis use

From: Prevalence and correlates of non-daily and daily cannabis use among persons 15 years and older in South Africa: results of a national survey in 2017

Variable Non-daily cannabis use Almost daily cannabis use
Crude RRR (95% CI) P-value Crude RRR (95% CI) P-value
Sex
 Female 1 (Reference)   1 (Reference)  
 Male 2.52 (2.06, 3.09) < 0.001 13.35 (9.11, 19.58) < 0.001
Age in years
 45 or more 1 (Reference)   1 (Reference)  
 30–44 1.69 (1.36, 2.09) < 0.001 2.06 (1.43, 2.96) < 0.001
 15–29 2.08 (1.68, 2.57) < 0.001 2.08 (1.49, 2.91) < 0.001
Education
 Grade 0–7 1 (Reference)   1 (Reference)  
 Grade 8–11 1.25 (1.01, 1.57) 0.042 2.60 (1.97, 3.44) < 0.001
 Grade 12 or more 1.09 (0.89, 1.35) 0.404 1.36 (1.02, 1.81) 0.037
Marital status
 Married 1 (Reference)   1 (Reference)  
 Separated/divorced/widowed 0.87 (0.63, 1.22) 0.427 0.97 (0.47, 2.02) 0.944
 Never married 2.12 (1.71, 2.62) < 0.001 3.05 (2.07, 4.51) < 0.001
Population group
 African Black 1 (Reference)   1 (Reference)  
 White 0.97 (0.71, 1.32) 0.836 0.50 (0.27, 0.94) 0.032
 Coloured 1.27 (0.97, 1.66) 0.086 1.54 (1.13, 2.08) 0.006
 Indian or Asian 0.98 (0.95, 1.47) 0.913 0.42 (0.24, 0.73) 0.002
Employement status
 Employed/self-employed 1 (Reference)   1 (Reference)  
 Unemployed 1.07 (0.88, 1.29) 0.499 0.83 (0.63, 1.09) 0.170
 Not in labour force 1.11 (0.86, 1.43) 0.414 0.35 (0.21, 0.57) < 0.001
Residence
 Rural informal (tribal areas) 1 (Reference)   1 (Reference)  
 Rural (farms) 1.12 (0.83, 1.51) 0.472 1.39 (0.85, 2.29 0.187
 Urban 1.09 (0.86, 1.37) 0.474 1.77 (1.22, 2.59) 0.003
Alcohol use disorder
 No 1 (Reference)   1 (Reference)  
 Yes 3.88 (2.68, 4.28) < 0.001 5.88 (4.54, 7.63) < 0.001
Other drugs
 No 1 (Reference)   1 (Reference)  
 Yes 46.89 (34.72, 63.33) < 0.001 13.96 (9.04, 21.54) < 0.001
Psychological distress
 No 1 (Reference)   1 (Reference)  
 Yes 1.11 (0.86, 1.43) 0.412 1.22 (0.87, 1.72) 0.254
Physical multimorbidity
 0 1 (Reference)   1 (Reference)  
 1 0.66 (0.53, 0.82) < 0.001 0.50 (0.33, 0.76) < 0.001
 2 or more 0.34 (0.21, 0.53) < 0.001 0.11 (0.04, 0.33) < 0.001
Health care utilization
 No 1 (Reference)   1 (Reference)  
 Yes 0.72 (0.61, 0.85) < 0.001 0.52 (0.39, 0.69) < 0.001
  1. RRR Relative Risk Ratio, CI Confidence Interval