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Table 2 Summary of the main characteristics of the eligible studies

From: External control of fluoridation in the public water supplies of Brazilian cities as a strategy against caries: a systematic review and meta-analysis

Author, year [ref] City of collection Mean annual temperature °C (Variation) Collection sites Number of collection sites Approximate volume collected (by sample) Time of collection Number of samples collected per month
Maia et al. [31] Niterói/RJ 28.4 °C Directly at the treatment station 1 + January 2000–December 2000 2
Lima et al. [36] Pelotas/RS + Public locations 16 5 mL November 1999–October 2001 1
Moura et al. [26] Teresina/PI 27 °C Public locations 5 5 mL June 2000–May 2001 1
Piva et al. [37] Cachoreira do Sul/RS + Basic Health Units or locations closer to the treatment unit 8 80 mL April 2005–March 2006 1
Amaral et al. [32] Piracicaba/SP (26.3–32.5 °C) Daycares in all the regions of the city 35 5 mL April 2004–February 2006 1
Silva et al. [30] Teresina, Floriano, and Parnaíba/PI 28 °C Basic Health Units and water treatment station 18 (six per city) 2 mL 2004–2005 1
Panizzi et al. [38] Chapecó/SC + Basic Health Units 10 50 mL November 1995–November 2005 1
Saliba et al. [33] 8 cities northeast the state of São Paulo (26.3–32.5 °C) Public locations 24 (three per city) + November 2004–October 2007 1
Peixoto et al. [29] Jaguaribara/CE (26.3–32.5 °C) Two public and one particular institution 3 15 mL August 2010–July 2011 2
Moimaz et al. [34] 29 cities in São Paulo⁋⁋ (26.3–32.5 °C) Public locations 193 + November 2004–October 2008 1
Assaf et al. [35] Nova Friburgo/RJ 27.9 °C Public institutions 60 50 mL March 2004–February 2011 1
Bergamo et al. [17] Maringá/PR 17.9 °C Site close to the treatment station 26 100 mL December 2010–November 2011 1
Brito et al. [39] Passo Fundo/RS 27.99 °C Basic Health Units 28 5 mL July 2009–July 2010 1
Kuhnen et al. [40] Lages/SC 18.1 °C * 22 + January 2013–December 2013 1
  1. + Not mentioned by the author; Alto Alegre, Bento de Abreu, Coroados, Gabriel Monteiro, Lourdes, Piacatu, Sud Mennucci, and Turiúba; ⁋⁋Alto Alegre, Araçatuba, Auriflama, Bento de Abreu, Birigui, Brejo Alegre Castilho, Coroados, Gabriel Monteiro, Guaraçai, Guararapes, Guzolândia, Ilha Solteira, Itapura, Lavínia, Lourdes, Mirandópolis, Murutinga do Sul, Nova Castilho, Nova Independência, Nova Luzitânia, Penápolis, Piacatú, Rubiácea, Santópolis do Aguapeí, Sud Mennucci, Suzanápolis, Turiúba,Valparaíso