Table 2

Risk of dropping out by age category (n=794, k=25)

Variable	RR	95% CI	Z	P value
18–29 vs 30–39 years	0.86	0.61 to 1.22	−0.84	0.399
18–29 vs 40–49 years	0.81	0.56 to 1.17	−1.12	0.264
18–29 vs 50–59 years	0.68	0.44 to 1.07	−1.65	0.098
18–29 vs 60–69 years	0.41	0.17 to 0.97	−2.02	0.043*
18–29 vs 70+ years	0.38	0.09 to 1.60	−1.32	0.186

*p < 0.05
RR, rate ratio.