Table 2.

Cumulative percentage of complete discontinuation according to age and time

Time (weeks)	30–49 years	50–59 years	60–69 years	70–79 years	> 80 years
0–2	27.8%	15.1%	10.3%	9.3%	11.5%
2–6	50.9%	29.0%	22.6%	21.8%	22.8%
6–13	65.2%	41.1%	32.7%	31.7%	31.9%
13–26	78.7%	56.1%	46.1%	42.4%	45.3%
26–39	83.5%	62.5%	53.7%	49.6%	52.4%
39–52	86.7%	68.3%	58.7%	55.9%	58.0%

The differences between age categories were statistically significant at each point in time (Chi-square, p < 0.05)