Table 3. Mean Changes in Positive and Negative Mood According to Follow-Up of the to the Two Groups Receiving Second and Third Generation Contraceptive Pills ^a,b.

MOOD	Group Receiving Second Generation, Mean ± SD	Group Receiving Third Generation, Mean ± SD	Mean Difference (95% CI)	Statistical Indicators
Positive mood
Mean Difference Two Months Later and Pre-Intervention	-5.06 ± 4.77	3.16 ± 3.01	-8.22 (-9.98, -6.47)	t = -9.31, df = 80, P < 0.001
Mean Difference Four Months Later and Pre-Intervention	-17.33 ± 6.69	11.43 ± 7.89	-28.77 (-31.99, 25.55)	t = -17.79, df = 80, P < 0.001
Repeated Measures ANCOVA (Inter-group)	F = 196.90, df = 2, P < 0.001	F = 65.01, df = 2, P < 0.001
Negative mood
Mean Difference Two Months Later and Pre-Intervention	7.81 ± 5.62	-4.80 ± 4.66	12.61 (-14.89, 10.340)	t = -11.05, df = 80, P < 0.001
Mean Difference Four Months Later and Pre-Intervention	18.03 ± 7.46	-10.12 ± 6.67	28.15 (31.24, 25.04)	t = 17.99, df = 80, P < 0.001
Repeated Measures ANCOVA(Inter-group)	F = 144.24, df = 2, P < 0.00	F = 65.02, df = 2, P < 0.001

^a Abbreviation: Mean Difference (Confidence Interval).

^b T-test.