Table 1

Mean number of prescription days and (mean) number of type of users between 2007 and 2010
Trimesters
2007 2008 Mean (%) 2009 2010 Mean (%) Difference means (p)
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
Mean number of prescription days 12.98ǂ 15.45 15.65 15.94 15.51 16.14 15.98 16.90 15.57 13.34 13.03 13.05 13.38 13.23 13.56 13.61 14.48 13.46 2.11
Type of user
no user ǂ 2642 2614 2608 2586 2619 2623 2532 2603 (56.2) 2597 2698 2802 2704 2645 2653 2642 2541 2660 (60.0) -56.82 (<0.001)
initial ǂ 458 404 449 417 399 389 435 422 (9.1) 270 365 363 429 378 367 351 408 366 (8.3) 55.20 (<0.001)
short-term ǂ 612 604 624 636 620 642 662 629 (13.6) 762 513 518 521 559 514 533 509 554 (12.5) 74.95 (<0.001)
long-term ǂ 556 591 580 580 594 592 606 586 (12.7) 454 461 445 447 445 474 467 483 460 (10.4) 126.07 (<0.001)
Quitter ǂ 365 427 385 431 404 364 345 389 (8.4) 475 496 357 340 390 378 342 340 390 (8.8) -1.04 (<0.046)
Total ǂ 4633 4640 4646 4650 4636 4610 4580 4629 (100) 4558 4533 4485 4441 4417 4386 4335 4281 4430 (100)
Supplementary analysis of short vs. long term users
short-term 1131 1100 1031 1109 1089 1057 1073 1138 1091 1071 904 909 981 972 916 922 949 953 138
long-term 459 583 615 598 602 628 617 626 591 467 478 465 459 460 489 483 509 476 114.75
Total 1590 1683 1646 1707 1691 1685 1690 1764 1682 1538 1382 1374 1440 1432 1405 1405 1458 1429

ǂ The first trimester of 2007 is omitted due to or affected by the unavailability of information of prescription days from the preceding trimester. Because of this, no information on initial users and quitters was available for the first trimester of 2007. As a consequence, presenting information on short-term and long-term users would generate an overestimation when compared to the information on short-term and long-term users in the following trimesters. Mean is based on the trimester means of the preceding two years.

Kollen et al.

Kollen et al. BMC Family Practice 2012 13:111   doi:10.1186/1471-2296-13-111

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