**Table 2.1. Sample sizes for hospital medical record reviews to assess
maternal HBsAg screening or hepatitis B vaccine birth** dose coverage

<table style="width:100%;">
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<tbody>
<tr class="odd">
<td colspan="20"><strong>Expected Maternal HBsAg Screening or Hepatitis
B Vaccine Birth Dose Coverage*</strong></td>
</tr>
<tr class="even">
<td><p><strong>Birth</strong></p>
<p><strong>Cohort Size</strong></p></td>
<td><strong>95%</strong></td>
<td><strong>90%</strong></td>
<td><strong>85%</strong></td>
<td><strong>80%</strong></td>
<td><strong>75%</strong></td>
<td><strong>70%</strong></td>
<td><strong>65%</strong></td>
<td><strong>60%</strong></td>
<td><strong>55%</strong></td>
<td><strong>50%</strong></td>
<td><strong>45%</strong></td>
<td><strong>40%</strong></td>
<td><strong>35%</strong></td>
<td><strong>30%</strong></td>
<td><strong>25%</strong></td>
<td><strong>20%</strong></td>
<td><strong>15%</strong></td>
<td><strong>10%</strong></td>
<td><strong>5%</strong></td>
</tr>
<tr class="odd">
<td>100</td>
<td>22</td>
<td>35</td>
<td>43</td>
<td>49</td>
<td>53</td>
<td>56</td>
<td>58</td>
<td>59</td>
<td>60</td>
<td>60</td>
<td>60</td>
<td>59</td>
<td>58</td>
<td>56</td>
<td>53</td>
<td>49</td>
<td>43</td>
<td>35</td>
<td>22</td>
</tr>
<tr class="even">
<td>200</td>
<td>25</td>
<td>43</td>
<td>55</td>
<td>65</td>
<td>72</td>
<td>77</td>
<td>81</td>
<td>84</td>
<td>85</td>
<td>86</td>
<td>85</td>
<td>84</td>
<td>81</td>
<td>77</td>
<td>72</td>
<td>65</td>
<td>55</td>
<td>43</td>
<td>25</td>
</tr>
<tr class="odd">
<td>300</td>
<td>26</td>
<td>46</td>
<td>61</td>
<td>73</td>
<td>82</td>
<td>89</td>
<td>94</td>
<td>97</td>
<td>99</td>
<td>100</td>
<td>99</td>
<td>97</td>
<td>94</td>
<td>89</td>
<td>82</td>
<td>73</td>
<td>61</td>
<td>46</td>
<td>26</td>
</tr>
<tr class="even">
<td>450</td>
<td>27</td>
<td>48</td>
<td>65</td>
<td>79</td>
<td>90</td>
<td>98</td>
<td>105</td>
<td>109</td>
<td>112</td>
<td>113</td>
<td>112</td>
<td>109</td>
<td>105</td>
<td>98</td>
<td>90</td>
<td>79</td>
<td>65</td>
<td>48</td>
<td>27</td>
</tr>
<tr class="odd">
<td>600</td>
<td>27</td>
<td>50</td>
<td>68</td>
<td>83</td>
<td>95</td>
<td>104</td>
<td>111</td>
<td>116</td>
<td>119</td>
<td>120</td>
<td>119</td>
<td>116</td>
<td>111</td>
<td>104</td>
<td>95</td>
<td>83</td>
<td>68</td>
<td>50</td>
<td>27</td>
</tr>
<tr class="even">
<td>800</td>
<td>28</td>
<td>51</td>
<td>70</td>
<td>86</td>
<td>99</td>
<td>109</td>
<td>117</td>
<td>122</td>
<td>125</td>
<td>126</td>
<td>125</td>
<td>122</td>
<td>117</td>
<td>109</td>
<td>99</td>
<td>86</td>
<td>70</td>
<td>51</td>
<td>28</td>
</tr>
<tr class="odd">
<td>1,000</td>
<td>28</td>
<td>51</td>
<td>71</td>
<td>88</td>
<td>101</td>
<td>112</td>
<td>120</td>
<td>126</td>
<td>129</td>
<td>130</td>
<td>129</td>
<td>126</td>
<td>120</td>
<td>112</td>
<td>101</td>
<td>88</td>
<td>71</td>
<td>51</td>
<td>28</td>
</tr>
<tr class="even">
<td>1,500</td>
<td>28</td>
<td>52</td>
<td>73</td>
<td>90</td>
<td>105</td>
<td>116</td>
<td>125</td>
<td>131</td>
<td>135</td>
<td>136</td>
<td>135</td>
<td>131</td>
<td>125</td>
<td>116</td>
<td>105</td>
<td>90</td>
<td>73</td>
<td>52</td>
<td>28</td>
</tr>
<tr class="odd">
<td>2,000</td>
<td>28</td>
<td>53</td>
<td>74</td>
<td>92</td>
<td>107</td>
<td>119</td>
<td>128</td>
<td>134</td>
<td>138</td>
<td>140</td>
<td>138</td>
<td>134</td>
<td>128</td>
<td>119</td>
<td>107</td>
<td>92</td>
<td>74</td>
<td>53</td>
<td>28</td>
</tr>
<tr class="even">
<td>3,000</td>
<td>28</td>
<td>53</td>
<td>75</td>
<td>93</td>
<td>108</td>
<td>121</td>
<td>131</td>
<td>137</td>
<td>142</td>
<td>143</td>
<td>142</td>
<td>137</td>
<td>131</td>
<td>121</td>
<td>108</td>
<td>93</td>
<td>75</td>
<td>53</td>
<td>28</td>
</tr>
<tr class="odd">
<td>5,000</td>
<td>28</td>
<td>53</td>
<td>75</td>
<td>94</td>
<td>110</td>
<td>123</td>
<td>133</td>
<td>140</td>
<td>144</td>
<td>146</td>
<td>144</td>
<td>140</td>
<td>133</td>
<td>123</td>
<td>110</td>
<td>94</td>
<td>75</td>
<td>53</td>
<td>28</td>
</tr>
<tr class="even">
<td>10,000</td>
<td>28</td>
<td>54</td>
<td>76</td>
<td>95</td>
<td>111</td>
<td>124</td>
<td>135</td>
<td>142</td>
<td>146</td>
<td>148</td>
<td>146</td>
<td>142</td>
<td>135</td>
<td>124</td>
<td>111</td>
<td>95</td>
<td>76</td>
<td>54</td>
<td>28</td>
</tr>
<tr class="odd">
<td>20,000</td>
<td>28</td>
<td>54</td>
<td>76</td>
<td>96</td>
<td>112</td>
<td>125</td>
<td>136</td>
<td>143</td>
<td>147</td>
<td>149</td>
<td>147</td>
<td>143</td>
<td>136</td>
<td>125</td>
<td>112</td>
<td>96</td>
<td>76</td>
<td>54</td>
<td>28</td>
</tr>
<tr class="even">
<td>40,000</td>
<td>28</td>
<td>54</td>
<td>76</td>
<td>96</td>
<td>112</td>
<td>126</td>
<td>136</td>
<td>144</td>
<td>148</td>
<td>150</td>
<td>148</td>
<td>144</td>
<td>136</td>
<td>126</td>
<td>112</td>
<td>96</td>
<td>76</td>
<td>54</td>
<td>28</td>
</tr>
<tr class="odd">
<td>50,000</td>
<td>28</td>
<td>54</td>
<td>76</td>
<td>96</td>
<td>112</td>
<td>126</td>
<td>136</td>
<td>144</td>
<td>148</td>
<td>150</td>
<td>148</td>
<td>144</td>
<td>136</td>
<td>126</td>
<td>112</td>
<td>96</td>
<td>76</td>
<td>54</td>
<td>28</td>
</tr>
<tr class="even">
<td>70,000</td>
<td>29</td>
<td>54</td>
<td>76</td>
<td>96</td>
<td>112</td>
<td>126</td>
<td>136</td>
<td>144</td>
<td>148</td>
<td>150</td>
<td>148</td>
<td>144</td>
<td>136</td>
<td>126</td>
<td>112</td>
<td>96</td>
<td>76</td>
<td>54</td>
<td>29</td>
</tr>
<tr class="odd">
<td>80,000</td>
<td>29</td>
<td>54</td>
<td>76</td>
<td>96</td>
<td>112</td>
<td>126</td>
<td>136</td>
<td>144</td>
<td>148</td>
<td>150</td>
<td>148</td>
<td>144</td>
<td>136</td>
<td>126</td>
<td>112</td>
<td>96</td>
<td>76</td>
<td>54</td>
<td>29</td>
</tr>
<tr class="even">
<td>100,000</td>
<td>29</td>
<td>54</td>
<td>76</td>
<td>96</td>
<td>112</td>
<td>126</td>
<td>136</td>
<td>144</td>
<td>148</td>
<td>150</td>
<td>148</td>
<td>144</td>
<td>136</td>
<td>126</td>
<td>112</td>
<td>96</td>
<td>76</td>
<td>54</td>
<td>29</td>
</tr>
<tr class="odd">
<td>150,000</td>
<td>29</td>
<td>54</td>
<td>76</td>
<td>96</td>
<td>112</td>
<td>126</td>
<td>136</td>
<td>144</td>
<td>148</td>
<td>150</td>
<td>148</td>
<td>144</td>
<td>136</td>
<td>126</td>
<td>112</td>
<td>96</td>
<td>76</td>
<td>54</td>
<td>29</td>
</tr>
<tr class="even">
<td>300,000</td>
<td>29</td>
<td>54</td>
<td>77</td>
<td>96</td>
<td>113</td>
<td>126</td>
<td>136</td>
<td>144</td>
<td>148</td>
<td>150</td>
<td>148</td>
<td>144</td>
<td>136</td>
<td>126</td>
<td>113</td>
<td>96</td>
<td>77</td>
<td>54</td>
<td>29</td>
</tr>
<tr class="odd">
<td colspan="20">* Using confidence interval of +/– 8%</td>
</tr>
</tbody>
</table>