A cross-sectional study of different patterns of oral contraceptive use among premenopausal women and circulating IGF-1: implications for disease risk

Blackmore, Kristina M; Wong, Jody; Knight, Julia A

doi:10.1186/1472-6874-11-15

Table 2 IGF-1 levels (ng/ml) for women aged 18 to 21 years and women aged 31 to 40 years according to different characteristics.

From: A cross-sectional study of different patterns of oral contraceptive use among premenopausal women and circulating IGF-1: implications for disease risk

	Ages 18 to 21 (n = 180)				Ages 31 to 40 (n = 148)
	No.	Mean (SD)	P*		No.	Mean (SD)	P*
Age			0.002				0.76
18	32	366.9 (121.5)		31 to 35	81	175.7 (61.0)
19 to 21	148	304.3 (96.9)		36 to 40	67	172.8 (51.4)
BMI (kg/m²)			0.36				0.12
< 20.0	33	312.1 (93.8)		< 25.0	82	178.8 (55.2)
20.0 - 24.9	107	323.6 (109.3)		25.0 - 29.9	41	178.8 (62.7)
≥ 25.0	40	296.3 (97.4)		≥ 30.0	25	152.9 (47.9)
Height (cm)			0.67				0.92
≤ 158.5	52	311.3 (109.8)		≤ 159.5	39	176.2 (61.8)
158.6 - 162.4	42	322.6 (101.2)		159.6 - 163.0	46	174.6 (56.8)
162.5 - 167.4	43	327.2 (102.6)		163.1 - 167.0	35	168.9 (46.7)
≥ 167.5	43	301.7 (103.1)		≥ 167.1	28	178.5 (63.0)
Weight (kg)			0.14				0.02
≤ 53.5	44	316.3 (101.6)		≤ 57.9	35	170.4 (48.8)
53.6 - 59.3	47	301.1 (95.6)		58.0 - 64.4	37	186.7 (62.0)
59.4 - 66.3	45	344.6 (122.2)		64.5 - 73.4	40	186.7 (52.5)
≥ 66.4	44	300.0 (91.6)		≥ 73.5	36	152.1 (57.6)
Ethnicity			0.08				0.90
European	69	327.2 (112.8)		European	96	172.7 (54.6)
East Asian	56	304.3 (108.6)		East Asian	11	186.1 (84.7)
South Asian	17	357.9 (92.9)		South Asian	7	171.4 (50.0)
Other/Mixed ^a	37	288.8 (76.4)		Other/Mixed ^a	34	176.2 (55.3)
Parity							0.49
Nulliparous	180	-		Nulliparous	112	176.3 (57.5)
Parous	0	-		Parous	36	168.7 (54.7)
Physical Activity^b
Childhood			0.29				0.17
Never	11	283.3 (81.5)		Never	22	159.1 (64.0)
Ever	169	317.5 (105.3)		Ever	126	177.1 (55.2)
Teenager			0.68				0.98
Never	31	322.4 (103.1)		Never	31	174.2 (60.6)
Ever	149	314.0 (104.6)		Ever	117	174.5 (55.9)
Current			0.78				0.04
Never	50	319.2 (116.6)		Never	23	151.9 (60.8)
Ever	129	314.3 (99.7)		Ever	125	178.6 (55.2)
Days since last period			0.77				0.02
≤ 14	72	312.6 (100.9)		≤ 14	66	162.1 (50.7)
>14	108	317.3 (106.7)		> 14	82	184.4 (59.6)

* Results of t-test, one-way ANOVA (where applicable); ^a Includes African, Caribbean, Middle Eastern, First Nation, Latin American; ^b Doing physical activity at least once per week

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ISSN: 1472-6874

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