Table 1.
Baseline demographic and clinical characteristics.
| Characteristics | Study Group 1 | p-Value | |
|---|---|---|---|
| Placebo (n = 39) | PS Group (n = 40) | ||
| Age, mean (SD) | 39.8 (13.0) | 39.0 (12.5) | 0.787 |
| Sex, female, No. (%) | 18 (46.2) | 21 (52.5) | 0.579 |
| Years of education, mean (SD) | 15.2 (1.91) | 15.4 (2.59) | 0.741 |
| Socioeconomic status, No. (%) | |||
| Upper | 7 (18.0) | 8 (20.0) | 0.844 |
| Upper Middle | 13 (33.3) | 16 (40.0) | |
| Middle | 17 (43.6) | 15 (37.5) | |
| Lower Middle | 2 (5.1) | 1 (2.5) | |
| Marriage, No. (%) | |||
| Married | 18 (46.2) | 16 (40.0) | 0.493 |
| Never married | 17 (43.6) | 22 (55.0) | |
| Divorced, widowed, or separated | 4 (10.3) | 2 (5.0) | |
| Caffeine intake (mg) 2 | 121 (121) | 95.4 (153) | 0.413 |
| Polygonatum tea intake (mL) | 18.8 (42.9) | 11.4 (22.8) | 0.340 |
p-values were calculated using the independent t-test for continuous variables and chi-square test or Fisher’s exact test for categorical variables. 1 Data are presented as mean (SD). 2 Includes coffee, tea, cola drink, and chocolate. PS, Polygonatum sibiricum; SD, Standard deviation; No.; number.