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Table 1 Characteristics of included studies

From: Effect of preventive zinc supplementation on linear growth in children under 5 years of age in developing countries: a meta-analysis of studies for input to the lives saved tool

Study ID (ref) Country Sample size (n) Mean initial age (months) Dose (mg/day) Duration (weeks) Mean initial height (cm) Mean initial HAZ score Grade (High, moderate and low)
Hong 1992[33] China 102 0 5 24 50.0 -0.08 Moderate
Bates 1993[34] Gambia 110 18 70 (/2wk) 64 76.8 -1.57 High
Dirren 1994[35] Ecuador 96 32 10 64 81.6 -2.89 Moderate
Castillo-Duran 1995[36] Chile 68 0 3 24 47.2 -1.36 Moderate
Ninh 1996[37] Vietnam 146 17.5 10 20 71.3 -2.91 Moderate
Sempertgui 1996[38] Ecuador 50 42.3 10 9 _ -2.00 Moderate
Ruz 1997[39] Chile 102 39.8 10 56 95.6 -0.52 High
Rosado 1997 Mexico 109 28 20 52 83.4 -1.55 moderate
Gardner 1998[42] Jamaica 61 14 10 12 68.7 -2.85 High
Lira 1998[41] Brazil 137 0 1 and 5 8 _ _ Moderate
Kikafunda 1998[40] Uganda 155 55.8 10 24 103.3 -0.70 Moderate
Rivera 1998[43] Guatemala 89 7.5 10 28 63.7 -2.16 High
Smith 1999[44] Belize 51 44 70 24 _ _ High
Umeta 2000 [45] Ethopia 100 9.6 10 24 69.9 -0.64 High
Castillo-Duran 2001[46] Chile 150 0 5 52 50.3 -0.06 High
Dijkhuizen 2001[47] Indonesia 238 4.2 10 24 61.2 -0.79 High
Osendarp 2002[48] Bangladesh 301 0.9 5 20 51.2 0.00 Low
Muller 2003 [49] Burkina Faso 709 18.5 24 75.5 8.7 -1.55 High
Sur 2003[50] India 100 0 5 52 46.4 -1.70 High
Black 2004[52] Bangladesh 94 6.5 20 24 _ -1.20 Moderate
Black 2004[53] India 200 1 5 32 47.5 -1.20 Moderate
Lind 2004[54] Indonesia 340 6 10 24 _ -0.35 High
Alarcon 2004[51] Peru 213 17 3 18 76.8 -1.04 High
Penny 2004[55] Peru 246 19 10 24 76.4 -0.16 High
Gardner 2005[57] Jamaica 114 19 10 24 77.1 -1.65 Moderate
Brooks2005[56] Bangladesh 1665 5.3 70(/wk) 52 62.7 -1.10 High
Wasantwist 2006[61] Thailand 304 4.5 10 24 62.3 -0.70 High
Silva 2006 [60] Brazil 58 23.5 10 16 _ -1.95 High
Berger 2006[58] Vietnam 391 5.9 10 24 63.8 -1.07 High
Olney 2006[59] Tanzania 433 8.8 10 52 _ -1.45 Moderate
Brown 2007[67] Peru 302 7.5 3 24 65.4 -1.19 High
Fahmida 2007[62] Indonesia 399 5 10 24 _ -0.99 High
Wuehler 2008[64] Ecuador 253 21 3,7and10 24 77.4 -2.30 High
Dijikhuizen 2008[63] Multicentre trial (Thailand, Veitnam and Indonesia) 2468 5.05 10 24 _ -0.82 High
Mozaffari-Khosarvi 2009[66] Iran 85 38.8 5 24 _ -1.65 High
Walker 2009 [65] Bangladesh 645 6.35 20 24 64.2 _ High