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Table 2 Descriptive information and extracted variables of interest for included studies

From: Longitudinal studies that use data collected as part of usual care risk reporting biased results: a systematic review

ID Study Study Design Sample Size Eligible Study outcome Country Method of analysis
1 Adams, et al. (2008) Retrospective 1806 Hemoglobin A1C levels USA Mixed model
2 Astrom, et al. (2014) Unclear 339 Intraocular pressure change Sweden Mixed model
3 Bernstein, et al. (2005) Retrospective 47 Mean arterial pressure USA Repeated measures
4 Biskupiak, et al. (2010) Retrospective 47,796 Blood pressure goals USA Logistic regression
5 Bradford, et al. (2006) Retrospective 50,741 Low-density lipoprotein goals USA Logistic regression
6 Cheung, et al. (2013) Retrospective 94 DBS electrode impedance USA Mixed model
7 Coplan,et al. (2005) Retrospective 91 Childhood Autism Rating Scale USA Mixed model
8 Dhawale, et al. (2013) Retrospective 7 Peak inspiratory pressure USA Repeated measures
9 Elmelund, et al. (2014) Retrospective 119 Plasma Creatinine levels Denmark Mixed model
10 Fattah, et al. (2014) Retrospective 10 Cephalometric outcomes Canada Repeated measures
11 Fatti, et al. (2010) Retrospective 2332 Virological suppression, weight South Africa GEE
12 Flack, et al. (2007) Unclear 459 Blood pressure response USA Mixed model
13 Fong, et al. (2009) Prospective 408 Cognitive decline USA Mixed model
14 Gao, et al. (2014) Prospective 2906 Changes in Blood pressure USA Linear regression
15 Ghate, et al. (2013) Retrospective 3038 Metabolic parameter monitoring USA Linear regression
16 Gofman, et al. (2009) Retrospective 95 Development of obesity USA Mixed model
17 Guelinckx, et al. (2010) Retrospective 605 Weight gain Belgium Mixed model
18 Haas, et al. (2012) Retrospective 413 Weight loss USA Repeated measures
19 Heintzelman, et al. (2013) Retrospective 33 Pain Finland Logistic regression
20 Henes, et al. (2010) Retrospective 109 Eating and TV behavior USA Repeated measures
21 Jehi, et al. (2011) Prospective 5960 Quality of life USA GEE
22 Kharbanda, et al. (2014) Retrospective 510 Changes in BMI, blood pressure USA Mixed model
23 Lasko, et al. (2013) Retrospective 4360 Unsupervised feature learning USA Gaussian regression
24 Maahs, et al. (2007) Retrospective 360 Total cholesterol, HDL USA Mixed model
25 Mahmud, et al. (2010) Prospective 190 Response to viral infection Pakistan Repeated measures
26 Mancevski, et al. (2007) Retrospective 99 Schizophrenia symptoms USA Repeated measures
27 McCoy, et al. (2006) Retrospective 41 Weight gain USA Mixed model
28 Nannetti, et al. (2009) Prospective 395 Post-stroke recovery Italy Repeated measures
29 Pan, et al. (2010) Prospective 253 Infant growth USA Mixed model
30 Patterson, et al. (2009) Prospective 90 Pulmonary function, weight USA Mixed model
31 Pirraglia, et al. (2012) Prospective 97 Blood pressure goals USA Repeated measures
32 Roth, et al. (2010) Retrospective 102 Disease severity Canada Linear regression
33 Ruiz, et al. (2013) Unclear 701 Mini Mental State Examination Spain Mixed model
34 Sarafoglou, et al. (2014) Retrospective 104 Adult Height USA Mixed model
35 Schwartz, et al. (2014) Retrospective 163,820 Body Mass Index trajectory USA Mixed model
36 Snijder, et al. (2012) Prospective 4680 Fetal growth Netherlands Mixed model
37 Sy, et al. (2008) Retrospective 58 Weight-for-age Canada Repeated measures
38 Tamayo, et al. (2015) Retrospective 725 Obesity Canada GEE
39 Tanabe, et al. (2012) Prospective 342 Changes in pain scores USA Linear regression
40 Ting, et al. (2005) Retrospective 120 Intensity of treatment USA Linear regression
41 Ullrich, et al. (2013) Retrospective 286 Pain and depression measures USA Repeated measures
42 Walker, et al. (2009) Retrospective 119 Quality of life USA Mixed model
43 Wong, et al. (2012) Retrospective 11,735 BMI trajectories USA IIW-GEE
44 Zechmann, et al. (2009) Retrospective 39 Prostate gland volume Germany Mixed model
ID Study Number of visits provided Gaps between visits provided Total follow-up time provided Assessment for predictors of visit times provided Need a method that accounts for irregularity Method to account for irregularity used Clearly defined end of study Comparison of those followed for duration of interest vs not
1 Adams, et al. (2008) No No Yes No Unclear No Yes No
2 Astrom, et al. (2014) Yes Yes Yes No Unclear No Yes No
3 Bernstein, et al. (2005) No No Yes No Unclear No Yes No
4 Biskupiak, et al. (2010) No No Yes No Unclear No Yes No
5 Bradford, et al. (2006) No No No No Unclear No Yes No
6 Cheung, et al. (2013) Yes No No No Unclear No Yes No
7 Coplan,et al. (2005) Yes No Yes No Unclear No No n/a
8 Dhawale, et al. (2013) Yes Yes Yes No Unclear No No No
9 Elmelund, et al. (2014) No No No No Unclear No Yes No
10 Fattah, et al. (2014) Yes No Yes No Unclear No No No
11 Fatti, et al. (2010) No No Yes No Yes No Yes Yes
12 Flack, et al. (2007) Yes No Yes No Unclear No No No
13 Fong, et al. (2009) No No No No Unclear No Yes No
14 Gao, et al. (2014) No No Yes No Yes No Yes Yes
15 Ghate, et al. (2013) No No No No Unclear No Yes No
16 Gofman, et al. (2009) No No Yes No Unclear No No Yes
17 Guelinckx, et al. (2010) Yes No No No Unclear No Yes n/a
18 Haas, et al. (2012) No No No No Yes No Yes No
19 Heintzelman, et al. (2013) Yes No Yes No Unclear No Yes n/a
20 Henes, et al. (2010) Yes No No No Unclear No Yes No
21 Jehi, et al. (2011) Yes No No No Unclear No Yes No
22 Kharbanda, et al. (2014) No No No No Unclear No Yes No
23 Lasko, et al. (2013) No No No No Unclear No No No
24 Maahs, et al. (2007) Yes No Yes No Unclear No Yes No
25 Mahmud, et al. (2010) No No No No Unclear No Yes No
26 Mancevski, et al. (2007) No No Yes No Yes No Yes n/a
27 McCoy, et al. (2006) Yes No Yes No Unclear No No No
28 Nannetti, et al. (2009) Yes No Yes No Unclear No Yes No
29 Pan, et al. (2010) Yes No Yes No Unclear No Yes No
30 Patterson, et al. (2009) Yes No No No Unclear No Yes No
31 Pirraglia, et al. (2012) Yes No No No Unclear No Yes No
32 Roth, et al. (2010) No No Yes No Unclear No Yes n/a
33 Ruiz, et al. (2013) No No No No Unclear No No No
34 Sarafoglou, et al. (2014) No No Yes No Unclear No Yes No
35 Schwartz, et al. (2014) Yes Yes Yes No Unclear No Yes Yes
36 Snijder, et al. (2012) Yes No Yes No Unclear No Yes No
37 Sy, et al. (2008) No No No No Unclear No Yes No
38 Tamayo, et al. (2015) Yes No Yes No Unclear No Yes No
39 Tanabe, et al. (2012) Yes No No No Unclear No Yes n/a
40 Ting, et al. (2005) Yes No No No Unclear No Yes No
41 Ullrich, et al. (2013) Yes No Yes Yes Yes No Yes Yes
42 Walker, et al. (2009) Yes No No No Unclear No No No
43 Wong, et al. (2012) Yes No Yes Yes Yes Yes Yes Yes
44 Zechmann, et al. (2009) Yes No Yes No Unclear No No No