Part 1: Results below are summarized from a cohort study of myocardial infarction associated with use of oral contraceptive pills among 500 women aged 18-45 years.

Table 1. Characteristics of users and non-users of oral contraceptive pills (N=500).

Age
18-24 years	74 (25%)	28 (14%)	102 (20%)
25-29 years	86 (29%)	35 (17%)	121 (24%)
30-34 years	60 (20%)	28 (14%)	88 (18%)
35-39 years	41 (14%)	65 (32%)	106 (21%)
40 years	36 (12%)	47 (23%)	83 (17%)
Education
	67 (55%)	55 (45%)	122 (100%)
High school	135 (62%)	84 (38%)	219 (100%)
High school	95 (60%)	64 (35%)	159 (100%)
Chronic heart disease	45 (15%)	51 (25%)	96 (19%)

Text: Among oral contraceptive users, 25% were 18-24 years of age and 22% had less than a high school education (Table 1). Among those who did not use oral contraceptives, 20% were 18-24 years of age and 47% had less than a high school education. Fewer women with heart disease were oral contraceptive users (15% vs. 25%, respectively).

1a. Identify at least four problems with this example table :

1b. Identify at least two problems with the sample text :

Part 2: Results from a study of air pollution and its association with low birthweight are summarized below .

	No. pregnancies LBW (%)	Unadjusted OR (95% CI)	Adjusted OR (95% CI)
Average NO2 concentration
0-40 NO2 ppb	8%	Reference	Reference
41-60 NO2 ppb	9%	1.13 (0.88. 1.38)	1.01 (0.71, 1.31)
61-80 NO2 ppb	10%	1.50 (1.12, 1.88)	1.38 (1.08, 1.68)
80 NO2 ppb	14%	1.75 (1.30, 2.20)	1.58 (1.25, 1.91)

Text: Among pregnancies exposed to 61-80 NO₂ ppb or 80 NO₂ ppb, the odds of low birth weight were 1.38 (1.08, 1.68) and 1.58 (1.25, 1.91), respectively (Table 1). No significant difference in the odds of low birthweight was observed for pregnancies exposed to 41-60 NO₂ ppb.

2a. Identify at least two things wrong with the table .

2b. Identify at least two things wrong with the text .