Table 1.
Comparison of relationships between vitamin D concentration status and living area (urban/rural), wealth grouping, and geographic region, among women.
| Comparisons: Women (1) | Vitamin D (1) | p-Value 1 | ||||||
|---|---|---|---|---|---|---|---|---|
| n | Mean (nmol/L) | SD (nmol/L) | Median (nmol/L) | 25th Percentile P25 (nmol/L) | 75th Percentile P75 (nmol/L) | |||
| Total | 725 | 69.7 | 31.2 | 64.9 | 47.5 | 88.2 | - | |
| Living Area | Urban | 148 | 67.7 | 29.7 | 60.6 | 46.6 | 85.7 | 0.301 |
| Rural | 577 | 70.2 | 31.6 | 66.8 | 47.8 | 89.0 | ||
| Wealth Group | Poorest | 155 | 71.7 | 34.2 | 66.6 | 47.8 | 92.3 | 0.358 |
| Poorer | 152 | 72.3 | 31.4 | 69.0 | 50.3 | 93.5 | ||
| Middle | 131 | 67.7 | 30.2 | 63.0 | 43.9 | 88.2 | ||
| Richer | 136 | 71.0 | 31.5 | 66.4 | 48.0 | 90.4 | ||
| Richest | 151 | 65.5 | 28.2 | 61.9 | 46.2 | 79.3 | ||
| Region 2 | Northeast | 101 | 62.0 | 26.7 | 57.1 | 41.9 | 73.8 | 0.001 |
| Southwest | 142 | 77.2 | 33.6 | 73.4 | 54.4 | 99.6 | ||
| Southeast | 235 | 69.8 | 30.0 | 66.2 | 47.6 | 86.7 | ||
| North | 102 | 64.8 | 35.9 | 57.8 | 36.9 | 85.7 | ||
| West | 145 | 71.0 | 28.7 | 67.0 | 51.6 | 84.4 | ||
1 Nonparametric (distribution-free) tests were performed since the Kolmogorov-Smirnov test indicated departure of vitamin D concentration data from normality (p = 0.000). Mann-Whitney Test was applied on two independent samples form living areas. Kruskal-Wallis test was applied on the independent samples with respect to wealth Group and region; 2 region: Northeast (Kratie, Mondol Kiri, Ratanak kiri, Stung Treng); Southwest (Kampong Speu, Kampot, Koh Kong, Sihanouk, Takeo); Southeast (Tboung Khmum, Svay Rieng, Prey Veng, Phnom Penh, Kandal, Kampong Chhnnang, Kampong Cham); North (Banteay Mean Chey, Preah Vihar, Ottar Mean Chey); and West (Siem Reap, Pailin, Pursat, Battambang, Kampong Thom).