Table 1.

Demographic characteristics of 339 couples, according to caffeine intake.

	Women						Men
	First Tertile		Second Tertile		Third Tertile		First Tertile		Second Tertile		Third Tertile
	0–86 mg/day		87–180 mg/day		181–480 mg/day		0–124 mg/day		125–209 mg/day		210–560 mg/day
	n = 114	33.6%	n = 116	34.2%	n = 109	32.1%	n = 112	33.1%	n = 113	33.3%	n = 114	33.6%
Daily Caffeine Intake (mg/day), Median (IQR)	37	14–60	128	111–147	215	188–255	62	17–100	180	154–189	258	231–310
Age (years)
<35	31	27.2	33	28.4	36	33.0	19	17.0	25	22.1	25	21.9
35–39	60	52.6	51	44.0	52	47.7	39	34.8	43	38.0	42	36.8
≥40	23	20.2	32	27.6	21	19.3	54	48.2	45	39.8	47	41.2
College Degree	62	54.4	67	57.8	53	48.6	42	37.5	42	37.2	51	44.7
Cause of Infertility
Unexplained	23	20.2	31	26.7	16	14.7	25	22.3	23	20.4	22	19.3
Female factor only	48	42.1	42	36.2	41	37.6	42	37.5	45	39.8	44	38.6
Male and female factor	43	37.7	43	37.1	52	47.7	45	40.2	45	39.8	48	42.1
BMI
<18.5	12	10.5	4	3.5	12	11.0	-	-	-	-	-	-
18.5–24.9	82	71.9	86	76.1	78	71.6	46	45.1	55	48.7	45	39.5
25.0–29.9	17	14.9	13	11.5	14	12.8	48	47.1	48	42.5	58	50.9
≥30.0	3	2.6	10	8.8	5	4.6	8	7.8	10	8.8	11	9.6
Smoking Habits
Never	74	64.9	72	62.1	49	45.0	55	53.4	46	40.7	28	24.8
Current	15	13.2	15	12.9	34	31.2	24	23.3	33	29.2	50	44.2
Former	25	21.9	29	25.0	26	23.8	24	23.3	34	30.1	35	31.0
Alcohol Intake
Abstainer	40	35.1	33	28.4	23	21.1	14	13.6	9	8.0	8	7.0
<1 unit/day	72	63.2	75	64.7	73	67.0	57	55.3	66	58.4	53	46.5
≥1 unit/day	2	1.7	8	6.9	13	11.9	32	31.1	38	33.6	53	46.5
Leisure Physical Activity
<2 h/week	57	50.0	66	57.4	69	63.3	36	35.3	48	42.9	49	43.8
2–4	44	38.6	43	37.4	32	29.4	37	36.3	44	39.3	38	33.9
>4	13	11.4	6	5.2	8	7.3	29	28.4	20	17.9	25	22.3
Previous ART Cycle	81	71.0	60	51.7	54	49.5	67	59.8	63	58.4	62	54.4
Daily Calories Intake (Kcal/day), Median (IQR)	1589	1367–1924	1748	1497–2124	1871	1602–2179	1781	1480-2060	1960	1649–2262	2122	1753–2407

Sometimes the sums do not add up to the totals because of missing values. Bold: p < 0.05, IQR: median and interquartile range; BMI: body mass index.