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Table 1 Baseline demographics and disease characteristics

From: Efficacy of 1% carboxymethylcellulose sodium for treating dry eye after phacoemulsification: results from a multicenter, open-label, randomized, controlled study

Baseline characteristic Treatment group (n = 90) Control group (n = 90) P value
Age, years (mean ± SD) 68.8 ± 7.1 69.0 ± 7.1 0.9349*
Female, n (%) 54 (60.0) 59 (65.6) 0.4407**
Patient with concomitant systemic diseases, n (%) 25 (27.8) 26 (28.9) 0.8686**
TBUT, s (mean ± SD) 7.7 ± 4.8 7.2 ± 4.1 0.7583*
Schirmer test, mm (mean ± SD) 12.6 ± 6.9 12.9 ± 6.9 0.6800*
Percentage of patients with dry eye, n (%)    
  TBUT ≤5 s + symptom score ≥3 34 (37.8) 32 (35.6)  
  Schirmer test ≤3 mm + symptom score ≥3 2 (2.2) 4 (4.4)  
  Total patients with dry eye 35 (38.9) 33 (36.7) 0.7585**
  1. SD, standard deviation; TBUT, tear film breakup time.
  2. *Wilcoxon rank sum test.
  3. **Chi-square test.