|  | Multiple logistic regression analysisd | |
---|---|---|---|
Characteristics | Prevalence of anemia (%) (95%CI) | odds ratio (95% CI) | P-value |
Gestational agea | Â | 1.89 (1.25, 2.85) | 0.003 |
   1st trimester | 53.1 (38.6, 67.5) |  |  |
   2nd trimester | 66.4 (57.8, 75.0) |  |  |
   3rd trimester | 75.9 (70.1, 81.7) |  |  |
Age | Â | 1.30 (0.91, 1.85) | 0.166 |
   <25 | 66.7 (58.2, 75.1) |  |  |
   25-30 | 70.3 (63.3, 77.5) |  |  |
   30+ | 73.1 (63.6, 82.1) |  |  |
Ethnicity | Â | 0.45 (0.23, 0.88) | 0.006 |
   Tibetan | 71.2 (66.2, 76.0) |  |  |
   Non-Tibetanb | 60.4 (46.1, 74.8) |  |  |
Residence | Â | 0.39 (0.24, 0.69) | 0.004 |
   Urban | 75.2 (69.3, 80.5) |  |  |
   Ruralc | 61.6 (53.7, 69.6) |  |  |
Parity | Â | 0.79 (0.57, 1.11) | 0.170 |
   0 | 71.3 (64.5, 78.2) |  |  |
   1 | 72.5 (64.4, 80.6) |  |  |
   2+ | 63.2 (52.4, 73.2) |  |  |
Annual income ($) | Â | 0.37 (0.16, 0.84) | 0.011 |
   <264 | 82.1 (71.8, 94.1) |  |  |
   264+ | 68.0 (62.8, 72.9) |  |  |
Total | 70.0 (65.4, 74.6) | Â | Â |