Table 1:

Characteristics of women included in the study cohort by type of progestin in oral contraceptive used (n = 2 721 014)

Characteristic	Desogestrel n = 351 322	Drospirenone n = 448 287	ETD n = 53 244	Levonorgestrel n = 495 748	Norethindrone n = 546 621	Norgestimate n = 722 667	Norgestrel n = 103 125
Age, yr, mean (SD)	28 (6.0)	28 (6.1)	29 (5.9)	29 (6.1)	30 (5.8)	27 (5.6)	29 (6.3)
Length of follow-up, d, mean (SD)	363 (479)	314 (396)	377 (492)	357 (471)	287 (431)	338 (433)	351 (470)
No. with gallbladder disease	3 911	4 974	632	5 201	4 789	6 432	1 148
Drug use, %
Statin	0.39	0.39	0.59	0.50	0.44	0.29	0.64
Fibrate	0.06	0.08	0.07	0.06	0.06	0.04	0.06
Medical history, %
Sickle-cell anemia	0.04	0.03	0.02	0.04	0.05	0.03	0.04
Diabetes mellitus	3.13	3.18	3.07	3.01	3.11	2.33	3.55
Inflammatory bowel disease	0.47	0.50	0.55	0.46	0.42	0.36	0.47
Pancreatitis	0.35	0.35	0.36	0.36	0.33	0.26	0.40
Smoking	5.00	4.60	5.65	5.29	5.01	4.65	5.91
Obesity	0.36	0.42	0.37	0.34	0.34	0.23	0.36

Note: ETD = ethynodiol diacetate, SD = standard deviation.