Table 1

Sample characteristics

Characteristic	Full sample (n=47 462) %	Preventing first birth (n=19 592) (41.3%) %	Limiting births (n=27 870) (58.7%) %
Age (years)
12–17	8.27	16.90	2.20
18–24	47.29	64.00	35.55
25–29	21.51	13.61	27.06
30–39	20.09	4.94	30.74
40–54	2.71	0.41	4.32
Education
Primary	8.70	2.80	12.85
Secondary	33.04	20.39	41.93
High school	38.83	46.05	33.76
University	17.35	28.62	9.42
State
Mexico City (Ciudad de México)	71.15	69.70	72.18
Other state	28.73	30.17	27.72
Occupation
Unemployed/Homemaker	24.49	9.33	35.14
Employed	46.53	49.97	44.12
Student	27.24	38.64	19.22

p<0.001 for all distributions by delaying or limiting. Data were missing for age for 0.13% of obsevations, for education 2.05%, for state 0.10% and for occupation 1.51%. Percentages may not add up to 100% .