Table.
Baseline characteristics of the 124 participants included in the study
| Total (n=124) | No new or expanded lesion at week 4 (n=103) | New or expanded lesion at week 4 (n=21) | p value* | ||
|---|---|---|---|---|---|
| Sex | .. | .. | .. | 0·61 | |
| Female | 37 (30%) | 32 (31%) | 5 (24%) | .. | |
| Male | 87 (70%) | 71 (69%) | 16 (76%) | .. | |
| Age, years | 34·3 (18·6–69·2) | 33·6 (18·6–69·2) | 37·8 (21·0–62·0) | 0·11 | |
| Weight, kg | 56·9 (10·4) | 56·8 (10·5) | 57·6 (10·0) | 0·73 | |
| Body-mass index | 20·2 (3·2) | 20·2 (3·2) | 20·3 (3·2) | 0·90 | |
| Current smoker† | 59/86 (69%) | 48/72 (67%) | 11/14 (79%) | 0·57 | |
| Previous smoker (not current smokers but report a history of smoking)† | 27/86 (31%) | 24/72 (33%) | 3/14 (21%) | 0·53 | |
| Duration of smoking, years | 15·7 (0·7–42·0) | 15·5 (0·7–42·0) | 15·6 (1·0–30·0) | 0·97 | |
| Cavities | .. | .. | .. | 0·0050 | |
| 0 | 9 (7%) | 9 (9%) | 0 | .. | |
| 1 | 76 (61%) | 68 (66%) | 8 (38%) | .. | |
| ≥2 | 39 (31%) | 26 (25%) | 13 (62%) | .. | |
| Total cavity volume, mL | 14·9 (20·3) | 13·4 (19·2) | 22·4 (24·2) | 0·12 | |
| Country, n | .. | .. | .. | 0·034 | |
| South Africa | 87 (70%) | 68 (66%) | 19 (90%) | .. | |
| China | 37 (30%) | 35 (34%) | 2 (10%) | .. | |
Data are n (%), mean (range), mean (SD), or n/N (%).
*
t test for continuous variables and χ2 or Fisher's exact test for categorical variables.
†
Missing values are because some participants did not declare smoking status.