Dreams: 1111
Date range: 2020-06-07 to 2026-05-09

Pattern distribution:
pattern
1     17
2    138
3    349
4    127
5    480
Name: count, dtype: int64

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1. MANN-KENDALL TREND TEST
============================================================
  Trend:      no trend
  Tau:        -0.0001
  p-value:    0.997940
  S:          -31.0
  Slope (Sen):0.000000

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2. ORDINAL LOGISTIC REGRESSION (pattern ~ time_in_years)
============================================================
  Coefficient (years):     -0.0003
  95% CI for coefficient:  [-0.0715, 0.0710]
  p-value:                 0.994295
  OR per year:             0.9997
  OR 95% CI:               [0.9310, 1.0736]

============================================================
3. SPLIT-HALF COMPARISON (Mann-Whitney U)
============================================================
  Split date:       2023-11-01
  First half  (n=556): mean=3.815, median=4.0
  Second half (n=555): mean=3.832, median=4.0
  U statistic: 153442
  p-value (one-sided, H1: first < second): 0.433105

  pattern distribution by half:
    pattern 1: first= 10 (  1.8%)  second=  7 (  1.3%)
    pattern 2: first= 74 ( 13.3%)  second= 64 ( 11.5%)
    pattern 3: first=167 ( 30.0%)  second=182 ( 32.8%)
    pattern 4: first= 63 ( 11.3%)  second= 64 ( 11.5%)
    pattern 5: first=242 ( 43.5%)  second=238 ( 42.9%)

Plot 1: Raw patterns over time with jitter + rolling mean --> plot saved.

Plot 2: Stacked proportions per quarter --> plot saved.
