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Table 2 Changes in periodontal knowledge score from baseline to follow-up among those who had seen the campaign and who did not

From: Assessment of periodontal knowledge following a mass media oral health promotion campaign: a population-based study

  Seen Not seen
  No. (%) No. (%)
Unit change of knowledge score   
−2 0.0 6 (1.6)
−1 17 (11.0) 51 (13.8)
0 56 (36.1) 168 (45.5)
1 58 (37.4) 121 (32.8)
2 18 (11.6) 20 (5.4)
3 6 (3.9) 3 (0.9)
Total 155* (100.0) 369* (100.0)
  1. *Since there were some missing responses to knowledge questions, the figures do not represent 163 and 380 respectively.