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Table 1 Study sample characteristics (mean ± SD or N (%))

From: Low vitamin D status strongly associated with periodontitis in Puerto Rican adults

Variable Cases (n = 19) Controls (n = 19)
Age (y) 47.6 ± 8.7 46.7 ± 8.2
Sex (females/males) 14 (73.7 %)/5 (26.3 %) 14 (73.7 %)/5 (26.3 %)
BMI (kg/m2) 29.5 ± 5.1 29.3 ± 6.0
PD (mm) 2.3 ± 0.4 1.3 ± 0.3a
AL (mm) 2.6 ± 0.6 1.3 ± 0.4a
Serum 25 (OH) D (ng/ml) 18.5 ± 4.6 24.2 ± 7.1b
  1. aSignificantly different from cases (p < 0.0001; Student’s t-test)
  2. bSignificantly different from cases (p = 0.006; Student’s t-test)
  3. BMI Body mass index, PD probing depth, AL attachment level