Table 2.
Demographical and clinical characteristics of the active smokers and passive smokers.
| Variable | Active smokers | Passive smokers | t value | p |
|---|---|---|---|---|
| Mean ± SD | Mean ± SD | |||
| Age (years) | 26.28 ± 3.83 | 25.53 ± 3.90 | 1.22 | 0.23 |
| VA (logMAR) | 0.05 ± 0.09 (20/40–20/20) | 0.05 ± 0.08 (20/40–20/20) | 0.08 | 0.93 |
| BCVA (logMAR) | 0.00 ± 0.00 (20/20–20/20) | 0.00 ± 0.00 (20/20–20/20) | — | — |
| SE (diopters) | −0.36 ± 0.41 | −0.37 ± 0.28 | 0.23 | 0.82 |
| AL (mm) | 24.18 ± 0.30 | 24.22 ± 0.26 | −0.83 | 0.41 |
| IOP (mmHg) | 13.13 ± 1.14 | 13.05 ± 1.08 | 0.49 | 0.62 |
| CCT (mm) | 544.76 ± 10.11 | 542.86 ± 12.35 | 1.06 | 0.29 |
| Urinary cotinine (ng/ml) | 511.58 ± 152.23 | 41.65 ± 9.92 | 27.55 | <0.0001 |
| Cotinine creatinine ratio (CCR) (ng/mg) | 598.32 ± 352.13 | 40.05 ± 27.01 | 14.14 | <0.0001 |
| The number of cigarettes per day | 23.50 ± 9.69 (10–60) | — | — | — |
| Duration of smoking (years) | 19.05 ± 4.89 (10–30) | — | — | — |
VA: visual acuity; BCVA: best corrected visual acuity; AL: axial length; SE: spherical equivalent; ng: nanogram.