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Table 4 Proportion of respondents reporting menstrual/breast health changes according to days of exposure

From: Health issues and healthcare utilization among adults who reported exposure to tear gas during 2020 Portland (OR) protests: a cross-sectional survey

Delayed menstrual/breast/chest health issues categories Participants reporting health issues by intensity of exposurea
1 day of exposure
N = 292
2–4 days of exposure
N = 1032
≥5 days of exposure
N = 326
n % n % n %
Any of menstrual/breast/chest health issues 116 39.7 566 54.8 217 66.6
 Increased menstrual cramping 71 24.3 367 35.6 166 50.9
 Unusual spotting 56 19.2 273 26.5 130 39.9
 Increased bleeding 41 14.0 223 21.6 125 38.3
 Increased number of days of spotting/bleeding 34 11.6 179 17.3 99 30.4
 Breast/chest tenderness 23 7.9 136 13.2 74 22.7
 Increased clots 9 3.1 85 8.2 66 20.2
 Change in the color of blood (spotting/bleeding) 15 5.1 80 7.8 52 16.0
 Absence of menstrual bleeding 9 3.1 66 6.4 32 9.8
 Decreased number of days of spotting/bleeding 8 2.7 39 3.8 23 7.1
 Other 14 4.8 66 6.4 23 7.1
  1. a Cochran–Armitage Trend test: p < 0.01 for all menstrual/breast/chest health issues, except “Other” p = 0.18