Appendix 11

A1C Conversion Chart

National Glucose Standardization Program (NGSP) values (%) and International Federation of Clinical Chemistry and Laborator Medicine (IFCC) values (mmol/mol) based on the formula of IFCC = 10.93(NGSP)-23.50. Conversions are grouped according to each percentage point on the NGSP measurement scale. IFCC-standardised values are rounded to the nearest whole number.
5 6 7 8 9
DCCT (%) IFCC
(mmol/ mol)
DCCT (%) IFCC
(mmol/ mol)
DCCT (%) IFCC
(mmol/ mol)
DCCT (%) IFCC
(mmol/ mol)
DCCT (%) IFCC
(mmol/ mol)
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
31
32
33
34
36
37
38
39
40
41
6.0
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
42
43
44
45
46
48
49
50
51
52
7.0
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
53
54
55
56
57
58
60
61
62
63
8.0
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
64
65
66
67
68
69
70
72
73
74
9.0
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
9.9
75
76
77
78
79
80
81
83
84
85
10 11 12 13 14
DCCT (%) IFCC
(mmol/ mol)
DCCT (%) IFCC
(mmol/ mol)
DCCT (%) IFCC
(mmol/ mol)
DCCT (%) IFCC
(mmol/ mol)
DCCT (%) IFCC
(mmol/ mol)
10.0
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
86
87
88
89
90
91
92
93
95
96
11.0
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
97
98
99
100
101
102
103
104
105
107
12.0
12.1
12.2
12.3
12.4
12.5
12.6
12.7
12.8
12.9
108
109
110
111
112
113
114
115
116
117
13.0
13.1
13.2
13.3
13.4
13.5
13.6
13.7
13.8
13.9
119
120
121
122
123
124
125
126
127
128
14.0
14.1
14.2
14.3
14.4
14.5
14.6
14.7
14.8
14.9
130
131
132
133
134
135
136
137
138
139

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