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Table 2 Sample distribution and reported intensity of menstruation according to reproductive and menstrual characteristics

From: Menstrual bleeding patterns: A community-based cross-sectional study among women aged 18-45 years in Southern Brazil

   Reported intensity menstrual flow
Characteristic N (%) Heavy Normal Light p
   304 (35.3) 340 (39.4) 218 (25.3)  
Age at menarche (years)      0.8
≤ 10 73 (8.5) 32 (43.8) 26 (35.6) 15 (20.5)  
11-12 363 (42.2) 128 (35.4) 143 (39.5) 91 (25.1)  
13-14 330 (38.3) 109 (33.1) 134 (40.7) 86 (26.1)  
≥ 15 95 (11.0) 32 (33.7) 37 (38.9) 26 (27.4)  
Number of pregnancies      <0.001
0 96 (11.1) 23 (24.0) 46 (47.9) 27 (28.1)  
1-3 603 (69.8) 197 (32.7) 251 (41.6) 155 (25.7)  
≥ 4 165 (19.1) 84 (51.5) 43 (26.4) 36 (22.1)  
Number of abortions      0.3
0 588 (76.6) 215 (36.6) 233 (39.7) 139 (23.7)  
≥1 180 (23.4) 66 (36.9) 61 (34.1) 52 (29.1)  
Contraceptive method currently in use1      <0.001
None 26 (3.2) 14 (53.9) 6 (23.1) 6 (23.1)  
Pill 416 (51.5) 102 (24.5) 177 (42.6) 137 (32.9)  
IUD 44 (5.5) 25 (56.8) 10 (22.7) 9 (20.5)  
Tubal ligation 93 (11.5) 63 (68.5) 16 (17.4) 13 (14.1)  
Injectable hormones 35 (4.3) 8 (22.9) 17 (48.6) 10 (28.6)  
Male preservative 121 (15.0) 46 (38.3) 52 (43.3) 22 (18.3)  
Others 73 (9.0) 23 (31.5) 40 (54.8) 10 (13.7)  
Duration of menstrual periods (days)      <0.001
≤ 3 332 (38.4) 67 (20.2) 124 (37.5) 140 (42.3)  
4 197 (22.8) 50 (25.4) 104 (52.8) 43 (21.8)  
≥ 5 335 (38.8) 187 (56.0) 112 (33.5) 35 (10.5)  
Extra-menstrual bleeding      0.001
No 788 (91.2) 262 (33.3) 320 (40.7) 204 (26.0)  
Yes 76 (8.8) 42 (55.3) 20 (26.3) 14 (18.4)  
Presence of blood clots      <0.001
No 398 (46.2) 98 (24.6) 181 (45.5) 119 (29.9)  
Yes 464 (53.8) 206 (44.4) 159 (34.3) 99 (21.3)  
  1. 1Currently pregnant (n = 35) and women at menopause (n = 19) excluded