Table 1

Descriptive statistics for each cooking water interval for each of the metrics for fluorosis assessment
Cooking water intervals (ppm) Photographic Convex hull software Existing technique
TF index Score Area ΔF ΔQ Area ΔF ΔQ
N (%)
<0.20 103 (18.6) Mean 0.70 Mean 0.144 Mean 0.047 Mean 0.008 Mean 0.096 Mean 2.362 Mean 0.233
SD 0.93 SD 0.105 SD 0.014 SD 0.007 SD 0.050 SD 0.482 SD 0.156
Median 0 Median 0.099 Median 0.044 Median 0.004 Median 0.081 Median 2.255 Median 0.228
Range 0-5 Range 0.025-0.464 Range 0.029-0.123 Range 0.001-0.033 Range 0.000-0.227 Range 1.294-2.983 Range 0.002-0.946
0.2 to 0.59 111 (20.1) Mean 1.01 Mean 0.181 Mean 0.048 Mean 0.010 Mean 0.110 Mean 2.264 Mean 0.257
SD 1.02 SD 0.130 SD 0.013 SD 0.010 SD 0.054 SD 0.455 SD 0.166
Median 1 Median 0.153 Median 0.044 Median 0.007 Median 0.099 Median 2.183 Median 0.228
Range 0-5 Range 0.023-0.555 Range 0.030-0.094 Range 0.007-0.046 Range 0.000-0.227 Range 1.356-2.364 Range 0.002-0.946
0.6 to 0.89 120 (21.7) Mean 1.28 Mean 0.210 Mean 0.053 Mean 0.014 Mean 0.121 Mean 2.359 Mean 0.304
SD 1.30 SD 0.151 SD 0.027 SD 0.020 SD 0.067 SD 0.542 SD 0.233
Median 1 Median 0.163 Median 0.046 Median 0.007 Median 0.103 Median 2.283 Median 0.227
Range 0-7 Range 0.024-0.635 Range 0.030-0.231 Range 0.001-0.146 Range 0.016-0.031 Range 1.477-4.414 Range 0.027-1.150
0.9 to 1.59 108 (19.5) Mean 1.65 Mean 0.252 Mean 0.057 Mean 0.017 Mean 0.133 Mean 2.392 Mean 0.333
SD 1.47 SD 0.162 SD 0.019 SD 0.016 SD 0.065 SD 0.494 SD 0.205
Median 1 Median 0.206 Median 0.052 Median 0.010 Median 0.129 Median 2.331 Median 0.283
Range 0-6 Range 0.039-0.678 Range 0.030-0.231 Range 0.001-0.080 Range 0.004-0.272 Range 1.324-3.873 Range 0.006-0.892
1.6+ 111 (20.1) Mean 2.30 Mean 0.299 Mean 0.062 Mean 0.022 Mean 0.155 Mean 2.592 Mean 0.424
SD 1.90 SD 0.179 SD 0.026 SD 0.022 SD 0.075 SD 0.582 SD 0.289
Median 2 Median 0.293 Median 0.056 Median 0.016 Median 0.150 Median 2.500 Median 0.359
Range 0-7 Range 0.025-0.715 Range 0.030-0.203 Range 0.001-0.145 Range 0.001-0.340 Range 1.345-4.630 Range 0.002-1.399
Total 553 (100)

McGrady et al.

McGrady et al. BMC Oral Health 2012 12:33   doi:10.1186/1472-6831-12-33

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