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. 2025 Aug 21;15(8):e097863. doi: 10.1136/bmjopen-2024-097863

Table 1. Prevalence of polypharmacy and baseline characteristics.

Characteristics Total population
n=1 876 527
Cumulative polypharmacy
(6-month window)
n=1 405 654
Cumulative polypharmacy
(1-month window)
n=1 211 378
Consecutive polypharmacy
(6-month window)
n=470 873
% (95% CI) P% (95% CI) P% (95% CI) P% (95% CI)
Overall 100 74.907
(74.845 to 74.969)
64.554
(64.486 to 64.623)
7.615
(7.577 to 7.653)
Sex
 Female 52.897
(52.825 to 52.968)
77.825
(77.744 to 77.907)
68.359
(68.267 to 68.45)
9.060
(9.003 to 9.116)
 Male 47.103
(47.032 to 47.175)
71.630
(71.536 to 71.724)
60.282
(60.18 to 60.384)
5.993
(5.943 to 6.042)
Age group
 65–69 37.600
(37.531 to 37.669)
74.713
(74.611 to 74.814)
63.550
(63.438 to 63.662)
6.923
(6.863 to 6.982)
 70–74 20.553
(20.495 to 20.611)
76.583
(76.45 to 76.717)
66.415
(66.266 to 66.564)
8.546
(8.458 to 8.634)
 75–79 17.414
(17.36 to 17.468)
77.010
(76.865 to 77.154)
67.403
(67.243 to 67.564)
8.921
(8.824 to 9.019)
 80–84 13.626
(13.576 to 13.675)
75.129
(74.961 to 75.296)
65.546
(65.362 to 65.73)
8.048
(7.943 to 8.154)
 ≥85 10.808
(10.763 to 10.852)
68.729
(68.528 to 68.931)
58.667
(58.453 to 58.882)
5.602
(5.502 to 5.702)
Fund
 Civil Servants 42.017
(41.946 to 42.087)
82.952
(82.869 to 83.035)
72.569
(72.47 to 72.667)
9.439
(9.374 to 9.504)
 Rural 31.344
(31.277 to 31.41)
59.055
(58.929 to 59.18)
48.305
(48.178 to 48.433)
1.865
(1.831 to 1.9)
 Iranian and Universal Health Insurance 16.747
(16.694 to 16.801)
77.356
(77.21 to 77.503)
65.598
(65.432 to 65.765)
5.466
(5.387 to 5.546)
 Other Social Strata 9.739
(9.697 to 9.781)
87.317
(87.165 to 87.47)
80.789
(80.608 to 80.97)
22.066
(21.875 to 22.256)
 Foreign Citizens 0.154
(0.148to 0.159)
55.312
(53.497 to 57.128)
44.757
(42.941 to 46.573)
0

P, prevalence.