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| Trial ID | ||
| Discontinuation mean ±SD | Continuation mean ±SD | |
| Bahadoran 2011 | 22 ±2.4 | 22 ±2.1 |
| Begum 2013 | Not reported | |
| Bor 2016 | 26 (23 to 30)* | 25 (22 to 32)* |
| Chookijkul 2016 | 26.8 ±4.1 | 27.3 ±4.8 |
| Chopra 2015 | 25.7 (20.5 to 31)** | 27.7 (23.8 to 30.6)** |
| Daniel‐Spiegel 2004 | Not reported | |
| Diven 2012 | 31.0 ±7.4 | 31.7 ±7.3 |
| Ozturk 2015 | Not reported | |
| Rashwan 2011 | 26.3 ±3.9 | 25.7 ±3.2 |
| Ustunyurt 2007 | 23.0 ±3.4 | 23.2 ±3.3 |
* Median (IQR)
** Mean (min to max)
