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Table 1 Characteristics of the study population

From: Essential fatty acids for premenstrual syndrome and their effect on prolactin and total cholesterol levels: a randomized, double blind, placebo-controlled study

Characteristics Groups
  A (1 g) B (2 g) C (Placebo)
Age (mean ± SD)Δ 33.0 ± 6.6 32.4 ± 6.1 32.7 ± 6.3
Marital status - n (%) *    
Single 14 (35.9) 15 (38.5) 16 (42.1)
Married 22 (56.4) 21 (53.8) 21 (55.3)
Other 03 (7.7) 03 (7.7) 01 (2.6)
Schooling - n (%) *    
Primary 16 (41.0) 19 (48.7) 19 (50.0)
High school 20 (51.3) 17 (43.6) 17 (44.7)
University 03 (7.7) 03 (7.7) 02 (5.3)
Ethnicity - n (%) *    
White 05 (12.8) 07 (17.9) 07 (18.4)
Non-white 34 (87.2) 32 (82.1) 31 (81.6)
Total 39 39 38
  1. Δ Test ANOVA (p = 0.926)
  2. * Pearson's chi-square test (marital status: p = 0.861; schooling: p = 0.925; ethnicity: p = 0.761)