CAT/C/EST/CO/5 permit a fuller analysis of who is complaining, where, for what reason, by whom, and with what result. Accordingly, the Committee regrets that this data is not disaggregated by crime or other characteristics, regarding complaints, investigations and prosecutions of cases of torture and ill-treatment by law enforcement, military, security and prison personnel, as well as on inter-prisoner violence, trafficking, violence against women, children and other vulnerable groups, including domestic and sexual violence, as well as means of redress provided to the victims (arts. 1, 2, 4, 11, 12, 13, 14 and 16). The State party should establish an effective system for national data collection that compiles statistical data relevant to the monitoring of the implementation of the Convention at the national level, including disaggregated data on complaints, investigations, prosecutions and convictions of cases of torture and ill-treatment by law enforcement and prison personnel, inter-prisoner violence, trafficking, violence, including domestic and sexual, against women, children and other vulnerable groups, as well as on means of redress, including compensation and rehabilitation, provided to the victims. Other issues 24. While taking note of the State party’s position in this regard, the Committee reiterates its recommendation that the State party consider making the declarations under articles 21 and 22 of the Convention. 25. The Committee invites the State party to consider ratifying the other United Nations human rights treaties to which it is not yet party, namely the International Convention for the Protection of All Persons from Enforced Disappearance; the International Convention on the Protection of the Rights of All Migrant Workers and Members of their Families; the Optional Protocol to the International Covenant on Economic, Social and Cultural Rights; the Optional Protocol to the Convention on the Elimination of All Forms of Discrimination against Women; and the Optional Protocol to the Convention on the Rights of the Child on the involvement of children in armed conflict. 26. The State party is requested to disseminate widely the report submitted to the Committee and the Committee’s concluding observations, in appropriate languages, including in Russian, through official websites, the media and non-governmental organizations. 27. The Committee requests the State party to provide, by 31 May 2014, follow-up information in response to the Committee’s recommendations relating to: (a) conducting prompt, impartial and effective investigations; (b) ensuring or strengthening legal safeguards for persons detained; and (c) prosecuting suspects and sanctioning perpetrators of torture or ill-treatment, as contained in paragraphs 9, 11, 12 and 14 of the present document. 28. The State party is invited to submit its next report, which will be the sixth periodic report, by 31 May 2017. For that purpose, the Committee will, in due course, submit to the State party a list of issues prior to reporting, considering that the State party has accepted to report to the Committee under the optional reporting procedure. 9