Table 1.

Descriptive Statistics for Mood and Smoking Variables, for the Total Sample and by Sex

	Total				Girls				Boys
	N	Range	M	SD	N	Range	M	SD	N	Range	M	SD
BASELINE
Negative Mood	517	1.00 - 6.36	2.44	0.97	287	1.02 - 6.36	2.47	0.93	230	1.00 - 5.83	2.42	1.02
Mood Variability	517	0.00 - 2.73	1.07	0.48	287	0.10 - 2.73	1.13	0.48	230	0.00 - 2.52	0.99	0.48 **
Daily Smoking Rate	512	0.00 - 15.00	0.30	1.36	285	0.00 - 15.00	0.45	1.75	227	0.00 - 6.67	0.12	0.53 **
6 MONTHS
Negative Mood	487	1.00 - 6.03	2.40	1.07	264	1.00 - 5.58	2.35	0.98	223	1.02 - 6.03	2.45	1.17
Mood Variability	487	0.03 - 3.12	0.99	0.52	264	0.03 - 3.12	1.03	0.51	223	0.07 - 2.61	0.94	0.52 *
Daily Smoking Rate	477	0.00 - 20.00	0.45	1.92	258	0.00 - 20.00	0.68	2.53	219	0.00 - 4.17	0.18	0.60 **
12 MONTHS
Negative Mood	466	1.01 - 7.13	2.32	1.04	255	1.01 - 4.92	2.25	0.88	211	1.03 - 7.13	2.39	1.20
Mood Variability	466	0.03 - 3.16	0.96	0.50	255	0.03 - 3.16	1.01	0.50	211	0.16 - 2.58	0.89	0.50 *
Daily Smoking Rate	465	0.00 - 20.00	0.60	2.12	251	0.00 - 20.00	0.89	2.70	214	0.00 - 8.00	0.26	1.00 **

Note. Negative Mood: Negative Affect Scale - EMA; Mood Variability: Intraindividual standard deviations of Negative Affect Scale;

Daily Smoking Rate: Average number of cigarettes smoked per day for the past 30 days - Self-Report Questionnaire.

For comparison of Girls versus Boys,

^*p < .05

^**p < .01