Table 1.: Classification criteria features in 25 patients of primary Sjögren syndrome with renal tubular acidosis.

Serial Number Ocular Symptoms Oral Symptoms Ocular Signs Anti-Ro* Anti-La* Grade of Lip Biopsy
1 + + + 199 299 4
2 0 + nd 171 185 4
3 + + + 179 57 4
4 0 0 + 220 0 4
5 + + + 190 168 4
6 + + + 219 218 4
7 0 + + 191 180 nd
8 + + + 213 170 4
9 0 0 0 226 243 4
10 + + + 147 34 4
11 0 + + 191 0 4
12 + + + 220 181 nd
13 + + 0 199 166 4
14 + + + 182 153 nd
15 + + + 190 302 nd
16 0 0 + 230 0 3
17 + + + 215 235 4
18 + + + 168 265 nd
19 0 0 + 204 184 4
20 0 + nd 222 162 3
21 + + + nd nd 4
22 + + + nd nd 4
23 + + + 206 271 4
24 0 + + 195 40 4
25 + + + nd nd 3

Highlighted rows indicate patients not fulfilling by American-European consensus (AEC) classification criteria. Of these four, with the exception of patient number 7, the remaining three fulfilled SjÖgren’s International Collaborative Clinical Alliance (SICCA) preliminary criteria. Therefore, patient 7 is considered as a case of ‘incomplete SjÖgren’.
+ indicates presence of symptoms, 0 indicates absence of symptoms, nd not done.
* cut off 20 Ru/ml.