Table 2

Distribution of histological findings by patient (n=105) and biopsy (n=279)

HistologyFrequency (n)(%)
By patient
 No sample/not analysed1312
 Normal histology only1010
 Hyperplasia only (H)†1615
 Squamous metaplasia only (S)‡44
 Goblet cell metaplasia only (G)§55
 H and S1211
 H and G§2423
 S and G22
 H and S and G§1918
 Total105100
By biopsy*
 Normal respiratory mucosa17362
 Hyperplasia16860
 Squamous metaplasia6925
 Goblet cell metaplasia9935
 Dysplasia41.4
 Carcinoma31.0

  • ↵* More than one histological feature is typically present on a single biopsy specimen.

  • ↵† Includes one patient with dysplasia and two with carcinoma.

  • ↵‡ Includes one patient with carcinoma.

  • ↵§ Includes one patient with dysplasia.